Romaine lettuce, Cos lettuce, Lettuce romaine
Lactuca sativa longifolia
🌿 Morphology
🌞 Growing conditions
🌍 Origin and family
🌾 Uses
Warning: Despite the care taken in writing this sheet, it is essential to cross-reference sources before using or consuming any plant. When in doubt, consult a qualified professional
Permaculture uses
Edible leaves are used in salads and sandwiches. Can be used as a cool-season cover crop. Provides habitat for beneficial insects. Some varieties are more heat tolerant. Can be used to attract slugs and snails away from more valuable crops. Can be used as a trap crop for aphids.
Permapeople description
An upright lettuce variety with elongated leaves, also known as romaine lettuce.
Botanical description
Romaine lettuce (Lactuca sativa longifolia) is a variety of lettuce that grows in a tall head of sturdy leaves. Unlike most lettuces, it is tolerant of heat. The leaves are elongated, often reaching 8-12 inches in length, and have a distinct rib. The texture is crisp and the taste is mild and slightly bitter. The color ranges from pale green to dark green, depending on the variety and maturity. It is an annual plant. The inflorescence is a composite head of yellow flowers.
Companion planting
Favorable: Carrots, cucumbers, radishes, strawberries, beets, onions. Unfavorable: Fennel, parsley.
Propagation methods
Sowing seeds directly in the ground or starting transplants indoors. Seedlings should be transplanted after the last frost. Seeds can be saved from bolted plants, though potential cross-pollination with other lettuce varieties should be considered. Can be direct sown, or started in seed trays.
History and traditions
Romaine lettuce has been cultivated for thousands of years, originating in the Mediterranean region. The Romans highly valued it, giving it its common name. It has been used traditionally for its nutritional value and mild sedative properties. It is often mentioned in historical texts regarding food and medicine. Some ancient cultures attributed aphrodisiac qualities to lettuce.
Usage calendar
Sowing: Spring and fall. Harvesting: Summer and fall. Planting: Spring and fall. Bolting: Summer. Flowering: Summer.