Lettuce has been always a popular vegetable. Lettuces come in different shapes and, because there are so many varieties, there is lettuce all year round. Each lettuce is referred to as a head. Most round varieties look like small heads. Lettuce is grown in different areas of the country year round. You will be hard pressed to see a grocery store that didn’t have at least one type of lettuce available every time you go in.
There are lots of lettuce species you can pick up in your local market or farmer’s market, but iceberg lettuce is the most popular and the least expensive. It contains a lot of water which is good for you, but also has a blander flavor and fewer nutrients than a darker, leafier lettuce like Romaine or Green Leaf lettuce.