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|Iceberg lettuce field in Northern Santa Barbara County|
| Lactuca sativa|
Lettuce can be grown in many parts of the world, including Europe, Asia, and North America, in temperate climates. It will turn more bitter tasting in hot weather. You can grow lettuce during winter in a greenhouse.
In some countries, it is often eaten cold and raw, in salads, hamburgers, tacos, and many other dishes. In some places, including China, lettuce is eaten cooked. Lettuce contains very little energy or nutrients.
Kinds of lettuce
The five main cultivars are: green leaf, red leaf, cos, crisphead, and stem lettuce.
Common varieties are Romaine, iceberg, and butter lettuce.
History of lettuce
Wild lettuce plants were eaten by the Romans and Egyptians. The ancient Greeks were among the first people to grow lettuce as a crop. It was one of the first plants brought to the New World by Christopher Columbus.