Free-from-pesticide hydroponic Locarno Leafy lettuce and other names for lettuce are both real plants that have roots. bundled up in a clean hydroponics facility without any contact from bare hands grown using RO water that has been filtered to remove any chemical or heavy metal residue available in refrigerable. Locarno/Curly The leaves of lettuce are a pale green color and have a tasty crunch. A diabetes-friendly diet can benefit from including it. The crisp, mild flavor of green leaf lettuce complements salads and sandwiches.