WebJul 20, 2024 · Lettuce was cultivated as early as 4500 BC, in the Mediterranean region, for oil extracted from the seeds. Since then, production of the annual plant has spread worldwide. Today, lettuce is grown almost exclusively for the fresh market. It is used in salads, sandwiches and as a garnish. WebDec 29, 2024 · Planting lettuce in a greenhouse If you want to plant it in the ground: Plant the lettuce seeds as soon as the soil is workable, preferably one or two weeks before the last spring frost date although …

Lettuce and Leafy Greens (greenhouse) – Produce Blue Book

WebRow width is 30 to 42 inches or 60 inches (leaf). In-row spacing -- 12 inches in double rows or 9 inches in 4 rows per bed. Plants per acre should be 12,000 to 34,000 plants, head lettuce; 20,000 to 46,000 plants, leaf lettuce. Amount of seed per acre is 16 to 20 oz. Planting depth of seed is 1 ⁄ 4 - to 3 ⁄ 8 -inch. WebIn crop production using minimal heat, plants are seeded from early September through the first week of October and harvested in November and December. Scheduling Early seeding is necessary because crops … trw pmf713

Canada releases new greenhouse lettuce crop profile

WebJun 25, 2024 · For example, greenhouse area devoted to cucumber and pepper production in 2024 was down 42 and 30 percent, respectively, compared to the change between 2009 and 2014. In contrast, lettuce and tomato protected culture area was up 28 and 23 percent, respectively, over the same period. WebLettuce requires cool temperatures to germinate. The seeded trays or cubes can be stacked and placed in a cooler at a temperature of 40 F (4.5 C). for 1 to 2 days to allow imbibition and initiation of germination. Once the seeds crack and begin to grow, immediately place them in the greenhouse at temperatures between 60 and 65 F (15-18 C). WebThree inch diameter PVC pipes with holes 6 inches on center are being used for leaf lettuce production. A common length is 10 or 12 feet. Carts may be used to move the pipes from the growing area to the packing room. Trays Periodically flooded … philips rapid air technology manual