Not to mention, very few garden tasks are more satisfying than assembling a freshly harvested salad. How To Cultivate Lettuce Plants. Lettuce is ideal for succession planting.Sow seeds every two weeks for production throughout the season, starting with early lettuce varieties, using heat-tolerant varieties as your main crop, and then switching to fall crops late in the summer. If you're in a climate with very little sun, purchase a grow light from a plant nursery and position it about 12 inches (30 cm) overhead. Lettuce seeds can be sown directly where you want them to grow, but the problem with this is that it leaves the emerging seedlings vulnerable to the hoards of pests that just love to eat them. Because lettuce seeds are so small, it is important to remember that you’ll need to go back over the grow area when germination has occurred in order to thin it out. Place your lettuce plant near a sunny window or a fluorescent grow light. You could plant lettuce next to your tomato plants or in the same row as your corn to give the necessary shade. Choose a pot at least 200mm and position in full sun. You can also raise in trays of Yates Seed Raising Mix and transplant when 3 … After you have planted the lettuce seeds, you’ll need to fill the pot the rest of the way with potting soil. For baby greens, sow lettuce seeds in 4” (10 cm) bands, about 60 seeds/foot (200 seeds/meter). Fill with quality potting mix, such as Yates Potting Mix with Dynamic Lifter. When planting, make sure each seed is planted 1/2 inch deep in the soil. Next, you’ll plant lettuce seeds in the pot. How to grow lettuce in a pot. Lettuce plants need at least 12 hours of direct sunlight a day, with 14-16 hours the preferred amount. Sow a few seeds directly into each planting hole and lightly cover with soil. If growing from seed, plant no more than 10 seeds per foot of growing space. Plant spacing for growing lettuce depends on the variety, and whether you’re growing lettuce for baby greens, or mature leaves or heads. Teeny-tiny lettuce seeds, with seedlings growing in a raised bed in the background. Depth and Spacing. Photo by Allison Sidhu. Here are two cultivation tips to keep in mind: Succession Planting. It is far better to sow the seeds onto fine soil in a seedling tray or a pot, … Individual plants require very little space, basic maintenance, and you can harvest leaves as needed once they reach a useable size. Lettuce Seed Depth and Plant Spacing . Lettuce plants grow best with direct sunlight. Potting soil leaves as needed once they reach a useable size or in soil... Each seed is planted 1/2 inch deep in the same row as your corn to give the shade. Quality potting mix, such as Yates potting mix, such as Yates potting mix such. Seeds, with seedlings growing in a raised bed in the pot about seeds/foot... 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