Crisphead lettuce is picked when the center is firm. You may wish to also label where you planted the lettuce, marking when it was planted as well. long, … Although the growing and care process is similar for all types, each lettuce has distinct characteristics in the garden. This plant was probably selectively bred by the Egyptians into a plant grown for its edible leaves,[22] with evidence of its cultivation appearing as early as 2680 BC. Lettuce is the only member of the genus Lactuca to be grown commercially. [15] Lettuce plants have a root system that includes a main taproot and smaller secondary roots. By avoiding the warm summer weather, you produce sweeter lettuce. You can even build a cold frame to grow lettuce in winter. How to Prevent and Mitigate Almond Hull Rot, Plant Folklore: Myths, Magic, and Superstition, 17 Awesome Amaryllis Varieties to Grow Indoors or Out. This should be done before they mature, usually within 60 days. If possible, water in the morning so plants have a chance to dry off during the course of the day. They are easier to grow than other varieties – including romaine, butterhead, and crisphead – and produce multiple harvests throughout the season. Get it as soon as Thu, Oct 1. It ships well, but is low in flavor and nutritional content, being composed of even more water than other lettuce types. The middle leaves are often self-blanching to a delicate white color. Freshly harvested, crisp leaves are highest in vitamin A and potassium. We received low temps and light snow yesterday. Once weeds begin to appear, lightly cultivate the soil so as to uproot the weeds, but not so heavily that new weed seeds are brought to the soil’s surface and given a chance to germinate. [13], Lettuce's native range spreads from the Mediterranean to Siberia, although it has been transported to almost all areas of the world. Season extension practices work well with leaf lettuce. Lettuce (Lactuca sativa) is an annual plant of the daisy family, Asteraceae. Product photos via True Leaf Market. [11] The current word lettuce, originally from Middle English, came from the Old French letues or laitues, which derived from the Roman name. [51] Lettuce has been linked to numerous outbreaks of the bacteria E. coli O157:H7 and Shigella; the plants were most likely contaminated through contact with animal feces. Ideally, soil should be loamy, well draining, and rich in organic matter, which helps to maintain soil moisture. If you start the seeds inside, the plants can benefit from an earlier planting date, and therefore a longer growing season. Best time of year. 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. Submitted by The Editors on April 8, 2019 - 2:53pm. Before maturity, you can harvest leaf lettuce by simply removing outer leaves so that the center leaves can continue to grow. Did I kill my lettuce plants or will they regrow? Contaminated lettuce is often a source of bacterial, viral, and parasitic outbreaks in humans, including E. coli and Salmonella. In addition to Iceberg, Ithaca, Great Lakes and Crispivo are great head lettuce cultivars. Oilseed – This type is grown for its seeds, which are pressed to extract an oil mainly used for cooking. soak it with water so that it could get rotten ,again it would attract organisms to feed , that way compost would be formed. Cos and loose-headed types: Plant 8 inches apart. Submitted by Anthony on May 7, 2017 - 3:53pm. [27], Western Europe and North America were the original major markets for large-scale lettuce production. Seed stems develop, and the plant begins diverting nutrients to seed production. It's been troublesome lately, and I was wondering if you would be so kind to help me. Firm-headed types: Plant 16 inches apart. By the late 20th century, the preferred types began to change, with crisphead, especially iceberg, lettuce becoming the dominant type in northern Europe and Great Britain and more popular in western Europe. Seeds are available from True Leaf Market. [31] After harvest, lettuce lasts the longest when kept at 0 °C (32 °F) and 96 percent humidity. Italienischer Lettuce – This shiny oakleaf lettuce is an attraction in the garden. Romaine and butterhead lettuce seedlings require 6 to 8 inches between each plant. [20] Scientific research into the genetic modification of lettuce is ongoing, with over 85 field trials taking place between 1992 and 2005 in the European Union and United States to test modifications allowing greater herbicide tolerance, greater resistance to insects and fungi and slower bolting patterns. [31] Many insects are attracted to lettuce, including cutworms, which cut seedlings off at the soil line; wireworms and nematodes, which cause yellow, stunted plants; tarnished plant bugs and aphids, which cause yellow, distorted leaves; leafhoppers, which cause stunted growth and pale leaves; thrips, which turn leaves gray-green or silver; leafminers, which create tunnels within the leaves; flea beetles, which cut small holes in leaves and caterpillars, slugs and snails, which cut large holes in leaves. [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.

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