These expert tips will teach you how to keep your lettuce fresh and delicious for a week (or more). How to Wash Lettuce There ...

Romaine lettuce is oblong, with long leaves that have a thick rib or stem. Loose-leaf lettuce is also just what it sounds like, as it doesn’t form a tight head like the other varieties.

Apart from traditional lettuces, such as 'Cos', 'Iceberg' and 'Butterhead', there are many others to try, including loose-leaf types and oak leaf lettuce, radicchio, rocket and endive.