where is lettuce grown in the world

[13], Lettuce's native range spreads from the Mediterranean to Siberia, although it has been transported to almost all areas of the world. Before World War I most lettuce grown in the U.S. was And today you rarely see a home garden without some kind of lettuce growing in it. [22] Most lettuce is used in salads, either alone or with other greens, vegetables, meats and cheeses. Lettuce leaves can also be found in soups, sandwiches and wraps, while the stems are eaten both raw and cooked. You can pick loose-leaf lettuce varieties from six weeks, at 10 weeks for hearting types. [33] Hydroponic growing methods can reduce this water consumption by nearly two orders of magnitude. It has a … Oilseed – This type is grown for its seeds, which are pressed to extract an oil mainly used for cooking. It can be plagued by numerous nutrient deficiencies, as well as insect and mammal pests, and fungal and bacterial diseases. [31] There are seven main cultivar groups of lettuce, each including many varieties: The butterhead and crisphead types are sometimes known together as "cabbage" lettuce, because their heads are shorter, flatter, and more cabbage-like than romaine lettuces. One variety, the celtuce (asparagus lettuce) (t: 萵苣; s: 莴苣; woju), is grown for its stems, which are eaten either raw or cooked. Because lettuce that flowers (through the process known as "bolting") becomes bitter and unsaleable, plants grown for consumption are rarely allowed to grow to maturity. 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. Starting in the 1990s, such programs began to include more distantly related species such as L. Europe and North America originally dominated the market for lettuce, but by the late 20th century the consumption of lettuce had spread throughout the world. Circa 50 AD, Roman agriculturalist Columella described several lettuce varieties – some of which may have been ancestors of today's lettuces. 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. [27], Western Europe and North America were the original major markets for large-scale lettuce production. Weeds also act as homes for insects and disease and can make harvesting more difficult. 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. [11] The current word lettuce, originally from Middle English, came from the Old French letues or laitues, which derived from the Roman name. The harvested lettuce is best stored at 0 °C and a humidity of 96%. Books published in the mid-18th and early 19th centuries describe several varieties found in gardens today. 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. In addition to its main use as a leafy green, it has also gathered religious and medicinal significance over centuries of human consumption. Ancient records note that lettuce was served at the royal table of Persian kings as early as 550 B.C. [56] Folk medicine has also claimed it as a treatment for pain, rheumatism, tension and nervousness, coughs and insanity; scientific evidence of these benefits in humans has not been found. [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. The initial settlers in South America considered lettuce to be a cure for small pox. [10], Lettuce appears in many medieval writings, especially as a medicinal herb. However, in China, a majority of the lettuce produced is utilized for domestic consumption. Iceberg lettuce was mainly produced in the western U.S. [16] Lettuces have a wide range of shapes and textures, from the dense heads of the iceberg type to the notched, scalloped, frilly or ruffly leaves of leaf varieties. Growing lettuce in greenhouses has many benefits, from lower water and land usage, to crops being protected from outside elements. However, this has led to the development of herbicide-resistant weeds and prompted environmental and health concerns.[20]. -Kelly W. ANSWER: By planting a few seeds every two weeks or so, gardeners in many parts of the world can grow lettuce year round.Most varieties of salad greens really thrive in the cool and mild times of year, when temperatures are 60 degrees Fahrenheit or lower. Miner’s lettuce is a perennial vegetable native to much of the western United States and Canada. In warm climates lettuce growing is usually restricted to the spring and fall, when temperatures are more moderate than in summer or winter. Celis regards the semi-closed greenhouse as the next step in the high-tech production of leafies. Similar to Mycelis muralis but showing more than 5 florets.. Ancient Egyptians would relate lettuce to sexual prowess. Lettuce is also used in cooked dishes in different parts of the world. Lettuce is grown in home gardens worldwide. Spain is the world's largest exporter of lettuce, with the US ranking second. Amy Schleunes Mar 9, 2020. How to Keep Growing Lettuce in Fall (and Winter) Even in cold winter areas, you can grow lettuce through the colder months if you give your plants some protection. Stem lettuce, widely consumed in China, is eaten either raw or cooked, the latter primarily in soups and stir-frys. By Oishimaya Sen Nag on April 25 2017 in Economics. Countries worldwide are steadily supplying more and more produce to Americans eager to “eat fresh” year-round

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