Lettuce is generally a pretty easy-going crop and they’ll do this on their own without intervention from us. If lettuce seedlings are exposed to 40 to 50 degrees Fahrenheit temperatures for several days in a row, they will start forming flower buds, although the flower stalk won't shoot up until the weather warms. The outer leaves are edible, but are not sweet like the blanched inner leaves. • Romaine lettuce does not form heart. It has a tightly compacted head with crisp, light-green leaves. Iceberg should be 12" apart. Butterhead. Most head lettuce varieties will bolt when it warms up and not form a head anyway. You’re right that iceberg, a popular crisphead type lettuce variety, do indeed form tight heads as they mature. Harvesting Iceberg Lettuce: If you have a big crop, begin to harvest iceberg lettuce after the head begins to form. Make sure to harvest when the heads are big and tightly packed. Growing your own iceberg lettuce is simple, especially when you keep the seedlings indoors for the first couple of months. Despite the fact that the iceberg lettuce has far less number of nutrients when compared to other green vegetables, it is not altogether ‘useless’ and has a few benefits. Many home gardeners find this type difficult to grow because it requires a long season and some of the most advertised varieties are not heat- Thin head lettuce to stand from 12 to 14 inches apart. Lettuce doesn't head well if it's crowded. It has curved, overlapping leaves forming crispy, round heads. Iceberg lettuce is great in salads, wraps, and a variety of other recipes. If this is what you're after (rather than a cutting mix) here is how to do it. Seed was planted too deep; place seed on seedbed and cover with ½ inch of soil. • Head lettuce does not form head. Plants that feel threatened by harsh temperatures will often go to seed. The leaves are creamy-white on the inside and are tightly-packed, having a mild flavor and crunchy texture. Leaves are tender and often mild but flavorful. However, there are conditions that can prevent this particular type from forming a proper head. In the south we plant lettuce in the fall. Even exposure to cold while the plants are seedlings can play a role. Once they reach this stage, bolting is … Iceberg lettuce is often referred as a ‘useless’ vegetable and there is also a joke stating that this vegetable will provide as much nutrients as a cardboard. Instead, it forms soft, loose heads that taste “buttery,” hence the name. How to Grow Iceberg Lettuce. They … If we can beat the hard freezes, head lettuce is possible here. Head Lettuce Though most types of lettuce will eventually form a head, there are some, such as iceberg and romaine, that are typically grown specifically for a tight, central head. Read more about growing leaf lettuce here. Crisphead , also known as 'Iceberg', is the lettuce most widely available as a fresh market type. You most likely planted a leaf lettuce. Also, fall crops often head better than summer crops - as the weather in the fall is cooling as they mature - which is exactly what they love. Of the head-forming lettuces, butterhead is considered to be a loose-heading type because the leaves don’t form tight, hard heads, like iceberg. So, even though we can control temperatures closely in greenhouses, producers may not be able to exactly emulate conditions that are common in field iceberg production. Butterhead Lettuce Plants are crowded. Other names: Head lettuce, iceberg lettuce Uses: Shredded in salads, on sandwiches, and garnished in snacks 2. Spring-sown crops mature as hot weather arrives. • Leaves of looseleaf varieties are … Lettuce is a cool weather plant. Your lettuce is bolting already, even if it a leaf lettuce. 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