This is its natural process. Romaine, also known as cos, forms tall, tight bundles of thick, sweet lettuce leaves. Lettuce loves cool weather. This process, known as bolting, produces bitter lettuce. How far apart to plant lettuce depends on the type of lettuce you’re planting. The plant panics and decides that it better produce seeds as quickly as possible. Harvesting lettuce seed is not really that difficult and only takes an hour or two at the end of the summer. There isn’t a systemic insecticide to control aphids, so your best option is to encourage natural predators, such as lady beetles, or to apply a horticultural soap or neem oil. Although many people assume red leaf lettuce is grown differently, growing red leaf lettuce is exactly the same as growing green lettuce. If you harvest every other lettuce plant, you give the remaining plants room to continue growing. Space your rows 12 to 18 inches apart. Cut the stock once it’s dry, turn over the sachet and gently remove the stock leaving the seeds in the tulle. One of the most popular types of lettuce, salad lovers all over the country often wonder how to grow Iceberg lettuce. Crisphead lettuce, or head for short, is the lettuce we know as Iceberg. Knowing how to harvest leaf lettuce is easy. Other gardening tricks to prevent bolting in warm weather include planting lettuce in shady areas, using mulch to cool the ground and conserve moisture, and providing a light mist of overhead irrigation to cool plants. Romaine and butterhead lettuce seedlings require 6 to 8 inches between each plant. By harvesting leaf lettuce through trimming it a few inches above the soil, you can get two to three harvests from one planting. Lettuce is an easy-to-grow annual vegetable. Each pair of lettuce seeds is attached to a white dandelion-like ‘parachute’ called pappus. When sowing seeds directly into the soil, you should plant approximately 10 seeds per foot. The goal is to simply keep the soil moist. The middle leaves are often self-blanching to a delicate white color. Leaf varieties reach maturity in 30 days but can be harvested as soon as they reach the desired size. Lettuce that bolted is telling you that it may not be the best adapted to your climate. Disclosure. Since the dawn of agriculture, farmers and gardeners have been saving seed. Romaine can be harvested in 1 of 2 ways: you can harvest the entire head of lettuce at once, whether by pulling up the head, roots and all, or by cutting off the head at the base. Store all your seeds in a cool, dry, and sunless location. Each pair of lettuce seeds is attached to a white dandelion-like ‘parachute’ called pappus. Designed with mobility in mind, they feature Gilmour’s innovative Swivel Connect. You know the seeds are ready to harvest when the pappus is well developed. Insecticides are one option, but traps, organic bait and hand picking provide organic solutions to these common pests. Typically lettuce will seed about 3 months after being planted. Lettuce seeds are often quite small and only require a planting depth of ¼ to ½ inch deep. Growing lettuce from seedlings for early spring transplant is a good way to get a head start on the growing season. Popular cultivars include Red Sails, Tango and Slobolt. This usually takes a good 2 months past your harvest and our spring lettuce was just about ready for seed gathering in the first week of August. Avoid watering too often – overwatering leads to root rot, disease and stunted growth. If you plan on growing lettuce during the summer or in warm planting zones, partial shade can provide protection from the heat.
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