Romaine Lettuce Seeds - Romaine and Cos Lettuce Varieties
Romaine lettuce, also known as cos lettuce, is one of the classic garden lettuces with elongated, loosely formed heads and particularly crisp leaves. The firm leaf ribs and the tender heart make this lettuce group especially aromatic and versatile in the kitchen.
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Cos lettuce is botanically a form of garden lettuce (Lactuca sativa) belonging to the so-called romaine or cos group. Unlike round head lettuce, it forms upright, elongated heads with sturdy leaves and a lighter, compact heart.
The name cos lettuce originates from an older cultivation method. In the past, the outer leaves were loosely tied together so that the inner part of the lettuce remained lighter and more tender. Modern varieties usually grow more compactly, so this tying is rarely necessary today.
