Once they reach this stage, bolting is … Butterhead. Make sure to harvest when the heads are big and tightly packed. Additionally, iceberg lettuce often requires specific environmental conditions to produce the tight head consumers are accustomed to- without bolting or becoming bitter. You most likely planted a leaf lettuce. 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. The outer leaves are edible, but are not sweet like the blanched inner leaves. Lettuce doesn't head well if it's crowded. Iceberg should be 12" apart. They … 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. If this is what you're after (rather than a cutting mix) here is how to do it. The leaves are creamy-white on the inside and are tightly-packed, having a mild flavor and crunchy texture. Thin head lettuce to stand from 12 to 14 inches apart. Harvesting Iceberg Lettuce: If you have a big crop, begin to harvest iceberg lettuce after the head begins to form. Even exposure to cold while the plants are seedlings can play a role. Seed was planted too deep; place seed on seedbed and cover with ½ inch of soil. • Leaves of looseleaf varieties are … Spring-sown crops mature as hot weather arrives. • Romaine lettuce does not form heart. You’re right that iceberg, a popular crisphead type lettuce variety, do indeed form tight heads as they mature. Plants are crowded. 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- Read more about growing leaf lettuce here. • Head lettuce does not form head. 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. 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. How to Grow Iceberg Lettuce. In the south we plant lettuce in the fall. Lettuce is generally a pretty easy-going crop and they’ll do this on their own without intervention from us. Lettuce is a cool weather plant. Most head lettuce varieties will bolt when it warms up and not form a head anyway. However, there are conditions that can prevent this particular type from forming a proper head. 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. 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. Instead, it forms soft, loose heads that taste “buttery,” hence the name. Butterhead Lettuce 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. Iceberg lettuce is great in salads, wraps, and a variety of other recipes. Growing your own iceberg lettuce is simple, especially when you keep the seedlings indoors for the first couple of months. If we can beat the hard freezes, head lettuce is possible here. It has a tightly compacted head with crisp, light-green leaves. Your lettuce is bolting already, even if it a leaf lettuce. Other names: Head lettuce, iceberg lettuce Uses: Shredded in salads, on sandwiches, and garnished in snacks 2. Leaves are tender and often mild but flavorful. Plants that feel threatened by harsh temperatures will often go to seed. It has curved, overlapping leaves forming crispy, round heads. Crisphead , also known as 'Iceberg', is the lettuce most widely available as a fresh market type. 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