Romaine/Cos Lettuce

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Storage Guidelines

Commercial storage guidance for all lettuce types: crisphead/iceberg, butterhead, cos/romaine and leaf. Storage life depends on initial quality, maturity, cultivar and handling; this is not a household shelf-life guarantee.

Lettuce is easily damaged by freezing and by ethylene, which causes russet spotting, so keep it just above freezing at very high humidity and away from ethylene-producing produce. Sensitive to ethylene: keep away from ethylene-producing fruit. Highest freezing point: -0.2°C. Source: USDA Agriculture Handbook 66 (rev. 2016).

Nutritional Information

Lettuce, cos or romaine, raw; USDA SR Legacy, FDC 169247, published 4/1/2019. Per 100 g edible portion, approximately: Energy: 17 kcal; Protein: 1.23 g; Fat: 0.3 g; Total carbohydrate (by difference): 3.29 g; Dietary fiber: 2.1 g; Vitamin C: 4 mg; Folate: 136 µg; Total sugars: 1.19 g. Generic reference for the stated edible food and processing form, not a cultivar-specific or item-specific measurement. Composition of an individual shipment has not been measured.