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