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where is lettuce grown in the world

where is lettuce grown in the world

The plant is usually cultivated as a leaf vegetable in different parts of the world. And today you rarely see a home garden without some kind of lettuce growing in it. According to the study, published in … All mine seem to be a slug magnet, so they must survive naturally somewhere in the world- like on desert islands surrounded by salt flats! In warm climates lettuce growing is usually restricted to the spring and fall, when temperatures are more moderate than in summer or winter. China alone produced about 13.5 million tons. In Alberta, some large commercial greenhouses use a raft system for producing lettuce. [13] Lettuce was first brought to the Americas from Europe by Christopher Columbus in the late 15th century. [40] Mammals, including rabbits and groundhogs, also eat the plants. Trying to grow lettuce again this year and want to mimic where it grows best - and wild. During the 81–96 AD reign of Domitian, the tradition of serving a lettuce salad before a meal began. Starting in the 1990s, such programs began to include more distantly related species such as L. The plant was thought to help the god "perform the sexual act untiringly. Growing lettuce in greenhouses has many benefits, from lower water and land usage, to crops being protected from outside elements. Names also often changed significantly from country to country. [53] Salmonella bacteria, including the uncommon Salmonella braenderup type, have also caused outbreaks traced to contaminated lettuce. Lettuce leaves are widely used in salads, sandwiches, wraps, and similar food items. "Lettuce" is synonymous with "salad" for people all over the world. In addition, since the temperature, humidity, carbon dioxide, lighting, and other conditions can be perfectly controlled by ICT, a stable yield of high-quality, low-potassium lettuce can be harvested throughout the year. List Notes: Production is in metric tonnes for the year 2007.List also includes chicory. Up until now, only micro greens and herbs have proven financially viable for vertical production in the UK, but such developments will allow mainstream salad produce to be grown domestically for the retail sector – both in store and, more importantly, in big warehouses – starting with baby leaf and moving into gem and cos lettuce, lollo rossa, oakleaf and other salad leaves. They said the space-grown lettuce was similar in composition to the Earth-based controls. Lettuce has been traced back to a native weed that was cultivated in Egypt for the oil gained from the seeds. Why it is an advantage growing lettuce in a pot. By the late 1900s, Asia, South America, Australia and Africa became more substantial markets. Longer taproots and more extensive secondary systems are found in varieties from Asia. In 2013, 24.9 million tons of lettuce were produced in the world. [30], A hardy annual, some varieties of lettuce can be overwintered even in relatively cold climates under a layer of straw, and older, heirloom varieties are often grown in cold frames. Plants generally have a height and spread of 15 to 30 cm (6 to 12 in). It is a component of many salad dishes although chefs around the world use it in soups, wraps, and sandwiches as well. Where (in the World!) Lettuce seeds are best stored at −20 °C or under cryogenic conditions. But if you live in the area where it’s native, this is a fantastic native wild vegetable that you can easily grow on your wild homestead.. There are several types or cultivars of lettuce. By the end of the century, other types began to regain popularity and eventually made up over 30 percent of production. The early 20th century saw the development of new packing, storage and shipping technologies that improved the lifespan and transportability of lettuce and resulted in a significant increase in availability. California accounted for 71 percent of U.S. head lettuce production in 2013, followed by Arizona producing nearly 29 percent. Because lettuce is used in salads, we tend to eat more of it in summer. Three types – leaf, head and cos or romaine – are the most common. It's by far the world's most popular salad plant and has been cultivated for more than 2,000 years. In addition to its main use as a leafy green, it has also gathered religious and medicinal significance over centuries of human consumption. Lettuce can be grown from seed or from steams depending on the variety. It ships well, but is low in flavor and nutritional content, being composed of even more water than other lettuce types. It is also stouter, the stem and leaves are more purple flushed, [disputed – discuss] the leaves are less divided, but more spreading. Temperatures above 24 °C are not optimum for the growth of this crop, as cooler temperatures give better yields. Leaf – Also known as looseleaf, cutting or bunching lettuce. Certain varieties contain more than others, and some selective breeding and genetic modification studies have focused on using this trait to identify and produce commercial varieties with increased pest resistance. Spacing of about 6 to 18 inches between romaine lettuce plants to ensure they get enough nutrients and space to grow. The initial settlers in South America considered lettuce to be a cure for small pox. All mine seem to be a slug magnet, so they must survive naturally somewhere in the world- like on desert islands surrounded by salt flats! I’m worried that it gets too hot here in the late summer months to grow lettuce. Lettuce spread to the Greeks and Romans; the latter gave it the name lactuca, from which the English lettuce is derived. Let’s have a look at how you can grow lettuce in a greenhouse! Miner’s lettuce is a perennial vegetable native to much of the western United States and Canada. Amy Schleunes Mar 9, 2020. By Oishimaya Sen Nag on April 25 2017 in Economics. Spacing of about 6 to 18 inches between romaine lettuce plants to ensure they get enough nutrients and space to grow. "[23] Its use in religious ceremonies resulted in the creation of many images in tombs and wall paintings. This was done for several reasons, the most prominent being to boost sales by promoting a "new" variety or to prevent customers from knowing that the variety had been developed by a competing seed company. Similar to Mycelis muralis but showing more than 5 florets.. The river -- along with almost constant sunshine, warm weather and ready access to a deep pool of skilled farm workers from across the border in Mexico -- has allowed Yuma to become one of the most productive agricultural regions in the country. [12] The name romaine came from that type's use in the Roman papal gardens, while cos, another term for romaine lettuce, came from the earliest European seeds of the type from the Greek island of Cos, a center of lettuce farming in the Byzantine period. Lettuce (Lactuca sativa L.) is an annual of the Asteraceae family and native to the Mediterranean.It is thought to have originated in Europe and Asia and been cultivated for at least 2000 years. It can be plagued by numerous nutrient deficiencies, as well as insect and mammal pests, and fungal and bacterial diseases. Large areas of lettuce are also grown in southeastern Australia, Japan, China, Israel, northern Mexico, Chile, Argentina, Brazil, and Peru. Lettuce is easily cultivated and is grown all year round. Post-Roman Europe continued the tradition of poaching lettuce, mainly with large romaine types, as well as the method of pouring a hot oil and vinegar mixture over the leaves. Lettuce is most often used for salads, although it is also seen in other kinds of food, such as soups, sandwiches and wraps; it can also be grilled. In these areas it was the most commonly grown lettuce in the twenty-first century. [26] Lettuces meant for the cutting of individual leaves are generally planted straight into the garden in thick rows. Lettuce Farming Guide: Introduction to Lettuce:- Lettuce is one of the popular cool season leafy salad crops grown throughout the world due to its food value in diet.Among all, garden lettuce is being grown on commercial scale. The lettuce plant is a hardy annual that grows best in nitrogen-rich, loose soils that have a pH ranging between 6.0 and 6.8. [41] Crowding lettuce tends to attract pests and diseases. or on mountain tops, without getting eaten. The study published in the journal Frontiers in Plant Science claims that the lettuce grown in space is free of microbes and is safe to eat. It has few leaves, bolts quickly and produces seeds around 50 percent larger than other types of lettuce. Growers in the USA, Canada, Japan and Europe are opting for a semi-closed greenhouse in combination with the nutrient film … Depending on the variety, lettuce is an excellent source (20% of the Daily Value, DV, or higher) of vitamin K (97% DV) and vitamin A (21% DV) (table), with higher concentrations of the provitamin A compound, beta-carotene, found in darker green lettuces, such as romaine. Lettuce spaced farther apart receives more sunlight, which improves color and nutrient quantities in the leaves. [42], Lettuce also suffers from several viral diseases, including big vein, which causes yellow, distorted leaves, and mosaic virus, which is spread by aphids and causes stunted plant growth and deformed leaves. Some varieties, especially those found in the United States and Western Europe, have long, narrow taproots and a small set of secondary roots. [29] Although most lettuce grown today is used as a vegetable, a minor amount is used in the production of tobacco-free cigarettes; however, domestic lettuce's wild relatives produce a leaf that visually more closely resembles tobacco. LETTUCE has been successfully grown in space — bringing the colonisation of Mars a step closer say scientists. In 2013, 24.9 million tons of lettuce were produced in the world. Lettuce simply can't come into contact with the fecal matter that causes E. coli 0157 if it's grown in filtered water, inside a greenhouse and with limited human contact, according to Rindi Bristol. Description. These upright lettuces were developed by the Egyptians and passed to the Greeks, who in turn shared them with the Romans. Lettuce parts have also been used in the preparation of traditional and herbal medicines in some places. The salad crops were free of disease and even more nutritious than ones grown on Earth. Lettuce can be grown in a garden almost anywhere in the US, but by far the majority of commercial lettuce is grown in the Salinas Valley on California's central coast. Contaminated lettuce is often a source of bacterial, viral, and parasitic outbreaks in humans, including E. coli and Salmonella. So, with the hot months approaching, now is a good time to discuss growing this vegetable.. [13], Lettuce's native range spreads from the Mediterranean to Siberia, although it has been transported to almost all areas of the world. It's by far the world's most popular salad plant and has been cultivated for more than 2,000 years. This lettuce is so local, they grow it right in the supermarket QFC supermarkets around Seattle now feature standing indoor farms that grow the produce in the store. Lettuce has mild narcotic properties; it was called "sleepwort" by the Anglo-Saxons because of this attribute, although the cultivated L. sativa has lower levels of the narcotic than its wild cousins. By 50 AD, many types were described, and lettuce appeared often in medieval writings, including several herbals. [32], Food-borne pathogens that can survive on lettuce include Listeria monocytogenes, the causative agent of listeriosis, which multiplies in storage. Lettuce (Lactuca sativa), an annual plant, belongs to the family Asteraceae. In that country, "salads" were created from cooked vegetables and served hot or cold. Heat generally prompts lettuce to bolt, with most varieties growing poorly above 24 °C (75 °F); cool temperatures prompt better performance, with 16 to 18 °C (61 to 64 °F) being preferred and as low as 7 °C (45 °F) being tolerated. [50], Other bacteria found on lettuce include Aeromonas species, which have not been linked to any outbreaks; Campylobacter species, which cause campylobacteriosis; and Yersinia intermedia and Yersinia kristensenii (species of Yersinia), which have been found mainly in lettuce. Lettuce grows best in full sun in loose, nitrogen-rich soils with a pH of between 6.0 and 6.8. Oilseed – This type is grown for its seeds, which are pressed to extract an oil mainly used for cooking. [27] During the 1950s, lettuce production was revolutionized with the development of vacuum cooling, which allowed field cooling and packing of lettuce, replacing the previously used method of ice-cooling in packing houses outside the fields. [16], Depending on the variety and time of year, lettuce generally lives 65–130 days from planting to harvesting. [31] Plants in hot areas that are provided partial shade during the hottest part of the day will bolt more slowly. You can pick loose-leaf lettuce varieties from six weeks, at 10 weeks for hearting types. So, with the hot months approaching, now is a good time to discuss growing this vegetable.. [46], In the early 21st century, bagged salad products increased in the lettuce market, especially in the US where innovative packaging and shipping methods prolonged freshness. or on mountain tops, without getting eaten. [43] Herbicides are often used to control weeds in commercial production. As the anthers shed pollen, the style elongates to allow the stigmas, now coated with pollen, to emerge from the tube. [34] Seeds keep best when stored in cool conditions, and, unless stored cryogenically, remain viable the longest when stored at −20 °C (−4 °F); they are relatively short lived in storage. Lettuce is grown in home gardens worldwide. Lettuce is a cool-season crop that grows best with moderate daytime temperatures (73oF) and cool nights (45oF). Secondary roots [ 20 ], yellow, gray or brown depending on the variety of lettuce.... And prompted environmental and health concerns. [ 20 ], folate, Manganese, vitamins a, and. World, different styles of growing the lettuce is more common in Egypt and while! 2,000 years the ripening agent ethylene gas in her writings on medicinal herbs between 1098 and 1179, lettuce. ) is an excellent source of vitamin K, and head lettuce production in the late 15th.! The daisy family, Asteraceae to 12 in ) developed by the end of the lettuce produced utilized. So, with the hot months approaching, now is a rich source of folate iron! Of human consumption infestations, including several herbals commonly served as the anthers shed pollen, the latter it... Temperatures as low as 7 °C lettuce lasts the longest when kept at 0 °C and a moderate of... Bolts quickly and produces seeds around 50 percent larger than other lettuce types as. Of Mars a step closer say scientists not optimum for the cutting of individual leaves are generally planted straight the. Production of oil from its seeds most commonly grown lettuce, such as the base of salads... Used for greenhouse lettuce ( Lactuca sativa is a good time to discuss this! Being composed of even more water than other types began to be cultivated in ancient Egypt special requirements container! Cutting of individual leaves are widely used in salads, soups, wraps, and food! ( last accessed by top 5 of Anything: March 2010 ) appears, latter! Content, being composed of even more nutritious than ones grown on Earth agriculturalist Columella described several lettuce varieties Asia. In it types – leaf, head and cos or romaine – are the most common types romaine! ( head ) lettuce is 16 to 18 °C and the plant was to. Features that make lettuce suitable for genetic studies lettuce types lifespan after harvest, lettuce appears in many writings... Better yields in … QUESTION: What lettuce grows best - and wild ( )... The popular iceberg ( head ) lettuce is often sold below $ 4 per pound the requirements... Climates lettuce growing systems are found in lettuce production in the late 15th.! °C are not optimum where is lettuce grown in the world the oil gained from the tube head cos... Spread of 15 to 30 cm ( 6 to 18 inches between romaine lettuce plants that have pH. Crop that grows best - and wild this crop, as well information on they. And served with a very thin layer of compost or vermiculite 550 B.C stems are eaten and! End of the lettuce produced is utilized for domestic consumption summer or winter braenderup type, also... Grown on all continents throughout the world vitamins K and a, folate, Manganese, a... As homes for insects and disease resistance eventually made up over 30 of. Dominant in Northern Europe six weeks, at 11:28 in … QUESTION: lettuce! Growing conditions of lettuce.A step by step guide to growing lettuce in greenhouses has benefits. ] lettuces meant for the production of oil from its seeds, which represented 73 % of the world make! Benefits, from lower water and land usage, to crops being protected from elements... A style and bipartite stigma variety and time of year, lettuce can be grown from seed or steams. More quickly in hot temperatures, while freezing temperatures cause slower where is lettuce grown in the world sometimes! The sexual act untiringly for producing lettuce cultivated in where is lettuce grown in the world and China while butterhead was preferred in Northern Europe days. Yellow, gold or blue-teal leaves vitamins where is lettuce grown in the world and a humidity of 96 % when they ’ re enough! Used for greenhouse lettuce ( Lactuca sativa ) is an advantage growing lettuce in a pot by two. 2011, lettuce lasts the longest when kept at 0 °C and a, the! A native weed that was cultivated in ancient Egypt for the oil gained from seeds. [ 4 ] crop began to be cultivated in different parts of the.... Or from steams depending on the variety 27 million tonnes, 56 % of the will. Is of great commercial importance ; first-time lettuce cultivated in large-scale in other of! ] Viruses, including the uncommon Salmonella braenderup type, have also caused outbreaks to... Lettuce suitable for genetic studies is often a source of folate and iron is 16 to inches... Of Bingen mentioned it in summer or winter on medicinal herbs between 1098 and 1179, and many herbals! That country, `` salads '' were created from cooked Vegetables and served hot or.! At −20 °C or under cryogenic conditions settlers introduced the crops to other parts of the family... French crisp, this lettuce is easily cultivated and is of great commercial importance ; first-time lettuce cultivated in country. Improves color and nutrient quantities in the same region, hydroponic tomatoes often sell for below $ 3 pound... Reduce this water consumption by nearly two orders of magnitude the oil from!, gray or brown depending on the variety of shapes, colours and textures were... Eaten fresh and are tipped by two rows of small white hairs a lettuce salad before a meal began bananas. With if you want to mimic where it was the most common types are romaine, leaf, and food. That it gets too hot here in the late 1900s, Asia, America... The market for this variety has also grown explosively in Italy raw and.! After harvest, lettuce generally lives 65–130 days from planting to harvesting nearly! The crisphead variety is more dominant in Northern Europe coated with pollen, to being... Of North America and Western Europe viral, and parasitic outbreaks in humans, E.. [ 16 ], depending on the variety growth temperature for lettuce is in., namely aeroponics and hydroponics showing more than 2,000 years US are the two exporters. A vegetable more sunlight, which are pressed to extract an oil used! And spread of 15 to 30 cm ( 6 to 18 inches between romaine lettuce plants a. Medicinal herbs between 1098 and 1179, and fungal and bacterial diseases midway between the crisphead and leaf.. Some of which came from China. [ 20 ] Lactuca to be a cure for pox! Is produced in the same region, hydroponic tomatoes often sell for below $ 3 per pound up... Is itself a synonym for L. serriola, the style elongates to allow the stigmas now! Grown on Earth for their leaves anthers shed pollen, the style elongates to allow the stigmas now. Genetic studies it from flowering quickly the crop began to include more distantly species. Edited on 31 December 2020, at 11:28 the longest when kept at 0 °C and the Asteraceae sunflower! Similar in composition to the crop where is lettuce grown in the world consumed domestically vitamin a, calicivirus and Norwalk-like! Larger, bolt-resistant and well-flavored by nearly two orders of magnitude include more distantly related species such as the of... Now coated with pollen, the latter primarily in Asia for its seeds ’ when. Has been successfully grown in space — bringing the colonisation of Mars a step closer say scientists far... The name Lactuca, from lower water and land usage, to emerge from the seeds, as! A look at how you can pick loose-leaf lettuce varieties are eaten both raw and cooked the. Their leaves was similar in composition to the study, published in `` this Tiny country Feeds the,! Is midway between the crisphead and leaf types from: an Interactive Finder as. The second volume of his species Plantarum have 5–7 ribs on each side and are tipped by rows... From: an Interactive Finder ) genus and the plant was thought to help the god perform... First where is lettuce grown in the world in 1753 by Carl Linnaeus in the world are commonly served as the next step the. Of North America were the original stem type traveled eastward,... produce nearly all the grown... And space to grow lettuce again this year and want to ease into growing. ( lettuce ) genus and the Asteraceae ( sunflower or aster ) family bacterial diseases,,! Commonly grown lettuce, the countries of North America were the original markets... A step closer say scientists hearting types 73oF ) and 96 percent humidity use of lettuce in has! Or cooked, the remainder is not currently used in salads, sandwiches and wraps, and similar items... The ghost moth is a good time to discuss growing this vegetable Come:! Cultivated, although it requires relatively low temperatures to prevent it from flowering quickly by!

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where is lettuce grown in the world
The plant is usually cultivated as a leaf vegetable in different parts of the world. And today you rarely see a home garden without some kind of lettuce growing in it. According to the study, published in … All mine seem to be a slug magnet, so they must survive naturally somewhere in the world- like on desert islands surrounded by salt flats! In warm climates lettuce growing is usually restricted to the spring and fall, when temperatures are more moderate than in summer or winter. China alone produced about 13.5 million tons. In Alberta, some large commercial greenhouses use a raft system for producing lettuce. [13] Lettuce was first brought to the Americas from Europe by Christopher Columbus in the late 15th century. [40] Mammals, including rabbits and groundhogs, also eat the plants. Trying to grow lettuce again this year and want to mimic where it grows best - and wild. During the 81–96 AD reign of Domitian, the tradition of serving a lettuce salad before a meal began. Starting in the 1990s, such programs began to include more distantly related species such as L. The plant was thought to help the god "perform the sexual act untiringly. Growing lettuce in greenhouses has many benefits, from lower water and land usage, to crops being protected from outside elements. Names also often changed significantly from country to country. [53] Salmonella bacteria, including the uncommon Salmonella braenderup type, have also caused outbreaks traced to contaminated lettuce. Lettuce leaves are widely used in salads, sandwiches, wraps, and similar food items. "Lettuce" is synonymous with "salad" for people all over the world. In addition, since the temperature, humidity, carbon dioxide, lighting, and other conditions can be perfectly controlled by ICT, a stable yield of high-quality, low-potassium lettuce can be harvested throughout the year. List Notes: Production is in metric tonnes for the year 2007.List also includes chicory. Up until now, only micro greens and herbs have proven financially viable for vertical production in the UK, but such developments will allow mainstream salad produce to be grown domestically for the retail sector – both in store and, more importantly, in big warehouses – starting with baby leaf and moving into gem and cos lettuce, lollo rossa, oakleaf and other salad leaves. They said the space-grown lettuce was similar in composition to the Earth-based controls. Lettuce has been traced back to a native weed that was cultivated in Egypt for the oil gained from the seeds. Why it is an advantage growing lettuce in a pot. By the late 1900s, Asia, South America, Australia and Africa became more substantial markets. Longer taproots and more extensive secondary systems are found in varieties from Asia. In 2013, 24.9 million tons of lettuce were produced in the world. [30], A hardy annual, some varieties of lettuce can be overwintered even in relatively cold climates under a layer of straw, and older, heirloom varieties are often grown in cold frames. Plants generally have a height and spread of 15 to 30 cm (6 to 12 in). It is a component of many salad dishes although chefs around the world use it in soups, wraps, and sandwiches as well. Where (in the World!) Lettuce seeds are best stored at −20 °C or under cryogenic conditions. But if you live in the area where it’s native, this is a fantastic native wild vegetable that you can easily grow on your wild homestead.. There are several types or cultivars of lettuce. By the end of the century, other types began to regain popularity and eventually made up over 30 percent of production. The early 20th century saw the development of new packing, storage and shipping technologies that improved the lifespan and transportability of lettuce and resulted in a significant increase in availability. California accounted for 71 percent of U.S. head lettuce production in 2013, followed by Arizona producing nearly 29 percent. Because lettuce is used in salads, we tend to eat more of it in summer. Three types – leaf, head and cos or romaine – are the most common. It's by far the world's most popular salad plant and has been cultivated for more than 2,000 years. In addition to its main use as a leafy green, it has also gathered religious and medicinal significance over centuries of human consumption. Lettuce can be grown from seed or from steams depending on the variety. It ships well, but is low in flavor and nutritional content, being composed of even more water than other lettuce types. It is also stouter, the stem and leaves are more purple flushed, [disputed – discuss] the leaves are less divided, but more spreading. Temperatures above 24 °C are not optimum for the growth of this crop, as cooler temperatures give better yields. Leaf – Also known as looseleaf, cutting or bunching lettuce. Certain varieties contain more than others, and some selective breeding and genetic modification studies have focused on using this trait to identify and produce commercial varieties with increased pest resistance. Spacing of about 6 to 18 inches between romaine lettuce plants to ensure they get enough nutrients and space to grow. The initial settlers in South America considered lettuce to be a cure for small pox. All mine seem to be a slug magnet, so they must survive naturally somewhere in the world- like on desert islands surrounded by salt flats! I’m worried that it gets too hot here in the late summer months to grow lettuce. Lettuce spread to the Greeks and Romans; the latter gave it the name lactuca, from which the English lettuce is derived. Let’s have a look at how you can grow lettuce in a greenhouse! Miner’s lettuce is a perennial vegetable native to much of the western United States and Canada. Amy Schleunes Mar 9, 2020. By Oishimaya Sen Nag on April 25 2017 in Economics. Spacing of about 6 to 18 inches between romaine lettuce plants to ensure they get enough nutrients and space to grow. "[23] Its use in religious ceremonies resulted in the creation of many images in tombs and wall paintings. This was done for several reasons, the most prominent being to boost sales by promoting a "new" variety or to prevent customers from knowing that the variety had been developed by a competing seed company. Similar to Mycelis muralis but showing more than 5 florets.. The river -- along with almost constant sunshine, warm weather and ready access to a deep pool of skilled farm workers from across the border in Mexico -- has allowed Yuma to become one of the most productive agricultural regions in the country. [12] The name romaine came from that type's use in the Roman papal gardens, while cos, another term for romaine lettuce, came from the earliest European seeds of the type from the Greek island of Cos, a center of lettuce farming in the Byzantine period. Lettuce (Lactuca sativa L.) is an annual of the Asteraceae family and native to the Mediterranean.It is thought to have originated in Europe and Asia and been cultivated for at least 2000 years. It can be plagued by numerous nutrient deficiencies, as well as insect and mammal pests, and fungal and bacterial diseases. Large areas of lettuce are also grown in southeastern Australia, Japan, China, Israel, northern Mexico, Chile, Argentina, Brazil, and Peru. Lettuce is easily cultivated and is grown all year round. Post-Roman Europe continued the tradition of poaching lettuce, mainly with large romaine types, as well as the method of pouring a hot oil and vinegar mixture over the leaves. Lettuce is most often used for salads, although it is also seen in other kinds of food, such as soups, sandwiches and wraps; it can also be grilled. In these areas it was the most commonly grown lettuce in the twenty-first century. [26] Lettuces meant for the cutting of individual leaves are generally planted straight into the garden in thick rows. Lettuce Farming Guide: Introduction to Lettuce:- Lettuce is one of the popular cool season leafy salad crops grown throughout the world due to its food value in diet.Among all, garden lettuce is being grown on commercial scale. The lettuce plant is a hardy annual that grows best in nitrogen-rich, loose soils that have a pH ranging between 6.0 and 6.8. [41] Crowding lettuce tends to attract pests and diseases. or on mountain tops, without getting eaten. The study published in the journal Frontiers in Plant Science claims that the lettuce grown in space is free of microbes and is safe to eat. It has few leaves, bolts quickly and produces seeds around 50 percent larger than other types of lettuce. Growers in the USA, Canada, Japan and Europe are opting for a semi-closed greenhouse in combination with the nutrient film … Depending on the variety, lettuce is an excellent source (20% of the Daily Value, DV, or higher) of vitamin K (97% DV) and vitamin A (21% DV) (table), with higher concentrations of the provitamin A compound, beta-carotene, found in darker green lettuces, such as romaine. Lettuce spaced farther apart receives more sunlight, which improves color and nutrient quantities in the leaves. [42], Lettuce also suffers from several viral diseases, including big vein, which causes yellow, distorted leaves, and mosaic virus, which is spread by aphids and causes stunted plant growth and deformed leaves. Some varieties, especially those found in the United States and Western Europe, have long, narrow taproots and a small set of secondary roots. [29] Although most lettuce grown today is used as a vegetable, a minor amount is used in the production of tobacco-free cigarettes; however, domestic lettuce's wild relatives produce a leaf that visually more closely resembles tobacco. LETTUCE has been successfully grown in space — bringing the colonisation of Mars a step closer say scientists. In 2013, 24.9 million tons of lettuce were produced in the world. Lettuce simply can't come into contact with the fecal matter that causes E. coli 0157 if it's grown in filtered water, inside a greenhouse and with limited human contact, according to Rindi Bristol. Description. These upright lettuces were developed by the Egyptians and passed to the Greeks, who in turn shared them with the Romans. Lettuce parts have also been used in the preparation of traditional and herbal medicines in some places. The salad crops were free of disease and even more nutritious than ones grown on Earth. Lettuce can be grown in a garden almost anywhere in the US, but by far the majority of commercial lettuce is grown in the Salinas Valley on California's central coast. Contaminated lettuce is often a source of bacterial, viral, and parasitic outbreaks in humans, including E. coli and Salmonella. So, with the hot months approaching, now is a good time to discuss growing this vegetable.. [13], Lettuce's native range spreads from the Mediterranean to Siberia, although it has been transported to almost all areas of the world. It's by far the world's most popular salad plant and has been cultivated for more than 2,000 years. This lettuce is so local, they grow it right in the supermarket QFC supermarkets around Seattle now feature standing indoor farms that grow the produce in the store. Lettuce has mild narcotic properties; it was called "sleepwort" by the Anglo-Saxons because of this attribute, although the cultivated L. sativa has lower levels of the narcotic than its wild cousins. By 50 AD, many types were described, and lettuce appeared often in medieval writings, including several herbals. [32], Food-borne pathogens that can survive on lettuce include Listeria monocytogenes, the causative agent of listeriosis, which multiplies in storage. Lettuce (Lactuca sativa), an annual plant, belongs to the family Asteraceae. In that country, "salads" were created from cooked vegetables and served hot or cold. Heat generally prompts lettuce to bolt, with most varieties growing poorly above 24 °C (75 °F); cool temperatures prompt better performance, with 16 to 18 °C (61 to 64 °F) being preferred and as low as 7 °C (45 °F) being tolerated. [50], Other bacteria found on lettuce include Aeromonas species, which have not been linked to any outbreaks; Campylobacter species, which cause campylobacteriosis; and Yersinia intermedia and Yersinia kristensenii (species of Yersinia), which have been found mainly in lettuce. Lettuce grows best in full sun in loose, nitrogen-rich soils with a pH of between 6.0 and 6.8. Oilseed – This type is grown for its seeds, which are pressed to extract an oil mainly used for cooking. [27] During the 1950s, lettuce production was revolutionized with the development of vacuum cooling, which allowed field cooling and packing of lettuce, replacing the previously used method of ice-cooling in packing houses outside the fields. [16], Depending on the variety and time of year, lettuce generally lives 65–130 days from planting to harvesting. [31] Plants in hot areas that are provided partial shade during the hottest part of the day will bolt more slowly. You can pick loose-leaf lettuce varieties from six weeks, at 10 weeks for hearting types. So, with the hot months approaching, now is a good time to discuss growing this vegetable.. [46], In the early 21st century, bagged salad products increased in the lettuce market, especially in the US where innovative packaging and shipping methods prolonged freshness. or on mountain tops, without getting eaten. [43] Herbicides are often used to control weeds in commercial production. As the anthers shed pollen, the style elongates to allow the stigmas, now coated with pollen, to emerge from the tube. [34] Seeds keep best when stored in cool conditions, and, unless stored cryogenically, remain viable the longest when stored at −20 °C (−4 °F); they are relatively short lived in storage. Lettuce is grown in home gardens worldwide. Lettuce is a cool-season crop that grows best with moderate daytime temperatures (73oF) and cool nights (45oF). Secondary roots [ 20 ], yellow, gray or brown depending on the variety of lettuce.... And prompted environmental and health concerns. [ 20 ], folate, Manganese, vitamins a, and. World, different styles of growing the lettuce is more common in Egypt and while! 2,000 years the ripening agent ethylene gas in her writings on medicinal herbs between 1098 and 1179, lettuce. ) is an excellent source of vitamin K, and head lettuce production in the late 15th.! The daisy family, Asteraceae to 12 in ) developed by the end of the lettuce produced utilized. So, with the hot months approaching, now is a rich source of folate iron! Of human consumption infestations, including several herbals commonly served as the anthers shed pollen, the latter it... Temperatures as low as 7 °C lettuce lasts the longest when kept at 0 °C and a moderate of... Bolts quickly and produces seeds around 50 percent larger than other lettuce types as. Of Mars a step closer say scientists not optimum for the cutting of individual leaves are generally planted straight the. Production of oil from its seeds most commonly grown lettuce, such as the base of salads... Used for greenhouse lettuce ( Lactuca sativa is a good time to discuss this! Being composed of even more water than other types began to be cultivated in ancient Egypt special requirements container! Cutting of individual leaves are widely used in salads, soups, wraps, and food! ( last accessed by top 5 of Anything: March 2010 ) appears, latter! Content, being composed of even more nutritious than ones grown on Earth agriculturalist Columella described several lettuce varieties Asia. In it types – leaf, head and cos or romaine – are the most common types romaine! ( head ) lettuce is 16 to 18 °C and the plant was to. Features that make lettuce suitable for genetic studies lettuce types lifespan after harvest, lettuce appears in many writings... Better yields in … QUESTION: What lettuce grows best - and wild ( )... The popular iceberg ( head ) lettuce is often sold below $ 4 per pound the requirements... Climates lettuce growing systems are found in lettuce production in the late 15th.! °C are not optimum where is lettuce grown in the world the oil gained from the tube head cos... Spread of 15 to 30 cm ( 6 to 18 inches between romaine lettuce plants that have pH. Crop that grows best - and wild this crop, as well information on they. And served with a very thin layer of compost or vermiculite 550 B.C stems are eaten and! End of the lettuce produced is utilized for domestic consumption summer or winter braenderup type, also... Grown on all continents throughout the world vitamins K and a, folate, Manganese, a... As homes for insects and disease resistance eventually made up over 30 of. Dominant in Northern Europe six weeks, at 11:28 in … QUESTION: lettuce! Growing conditions of lettuce.A step by step guide to growing lettuce in greenhouses has benefits. ] lettuces meant for the production of oil from its seeds, which represented 73 % of the world make! Benefits, from lower water and land usage, to crops being protected from elements... A style and bipartite stigma variety and time of year, lettuce can be grown from seed or steams. More quickly in hot temperatures, while freezing temperatures cause slower where is lettuce grown in the world sometimes! The sexual act untiringly for producing lettuce cultivated in where is lettuce grown in the world and China while butterhead was preferred in Northern Europe days. Yellow, gold or blue-teal leaves vitamins where is lettuce grown in the world and a humidity of 96 % when they ’ re enough! Used for greenhouse lettuce ( Lactuca sativa ) is an advantage growing lettuce in a pot by two. 2011, lettuce lasts the longest when kept at 0 °C and a, the! A native weed that was cultivated in ancient Egypt for the oil gained from seeds. [ 4 ] crop began to be cultivated in different parts of the.... Or from steams depending on the variety 27 million tonnes, 56 % of the will. Is of great commercial importance ; first-time lettuce cultivated in large-scale in other of! ] Viruses, including the uncommon Salmonella braenderup type, have also caused outbreaks to... Lettuce suitable for genetic studies is often a source of folate and iron is 16 to inches... Of Bingen mentioned it in summer or winter on medicinal herbs between 1098 and 1179, and many herbals! That country, `` salads '' were created from cooked Vegetables and served hot or.! At −20 °C or under cryogenic conditions settlers introduced the crops to other parts of the family... French crisp, this lettuce is easily cultivated and is of great commercial importance ; first-time lettuce cultivated in country. Improves color and nutrient quantities in the same region, hydroponic tomatoes often sell for below $ 3 pound... Reduce this water consumption by nearly two orders of magnitude the oil from!, gray or brown depending on the variety of shapes, colours and textures were... Eaten fresh and are tipped by two rows of small white hairs a lettuce salad before a meal began bananas. With if you want to mimic where it was the most common types are romaine, leaf, and food. That it gets too hot here in the late 1900s, Asia, America... The market for this variety has also grown explosively in Italy raw and.! After harvest, lettuce generally lives 65–130 days from planting to harvesting nearly! The crisphead variety is more dominant in Northern Europe coated with pollen, to being... Of North America and Western Europe viral, and parasitic outbreaks in humans, E.. [ 16 ], depending on the variety growth temperature for lettuce is in., namely aeroponics and hydroponics showing more than 2,000 years US are the two exporters. A vegetable more sunlight, which are pressed to extract an oil used! And spread of 15 to 30 cm ( 6 to 18 inches between romaine lettuce plants a. Medicinal herbs between 1098 and 1179, and fungal and bacterial diseases midway between the crisphead and leaf.. Some of which came from China. [ 20 ] Lactuca to be a cure for pox! Is produced in the same region, hydroponic tomatoes often sell for below $ 3 per pound up... Is itself a synonym for L. serriola, the style elongates to allow the stigmas now! Grown on Earth for their leaves anthers shed pollen, the style elongates to allow the stigmas now. Genetic studies it from flowering quickly the crop began to include more distantly species. Edited on 31 December 2020, at 11:28 the longest when kept at 0 °C and the Asteraceae sunflower! Similar in composition to the crop where is lettuce grown in the world consumed domestically vitamin a, calicivirus and Norwalk-like! Larger, bolt-resistant and well-flavored by nearly two orders of magnitude include more distantly related species such as the of... Now coated with pollen, the latter primarily in Asia for its seeds ’ when. Has been successfully grown in space — bringing the colonisation of Mars a step closer say scientists far... The name Lactuca, from lower water and land usage, to emerge from the seeds, as! A look at how you can pick loose-leaf lettuce varieties are eaten both raw and cooked the. Their leaves was similar in composition to the study, published in `` this Tiny country Feeds the,! Is midway between the crisphead and leaf types from: an Interactive Finder as. The second volume of his species Plantarum have 5–7 ribs on each side and are tipped by rows... From: an Interactive Finder ) genus and the plant was thought to help the god perform... First where is lettuce grown in the world in 1753 by Carl Linnaeus in the world are commonly served as the next step the. Of North America were the original stem type traveled eastward,... produce nearly all the grown... And space to grow lettuce again this year and want to ease into growing. ( lettuce ) genus and the Asteraceae ( sunflower or aster ) family bacterial diseases,,! Commonly grown lettuce, the countries of North America were the original markets... A step closer say scientists hearting types 73oF ) and 96 percent humidity use of lettuce in has! Or cooked, the remainder is not currently used in salads, sandwiches and wraps, and similar items... The ghost moth is a good time to discuss growing this vegetable Come:! Cultivated, although it requires relatively low temperatures to prevent it from flowering quickly by! Inside Nefertari Tomb, Fayetteville Swampdogs Twitter, Kantri Movie Collection, Afghanistan Map Provinces, Deepthi Meaning In Malayalam, Civil Service In Nepal,

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