Botanical Name: Lactuca sativa, Brassica rapa, Eruca sativa
Days to Maturity: 20–45 days
Native: UnUnknown; lettuce has been in cultivation for a long time.
Hardiness: Frost-tolerant annuals
Plant Dimensions: Leaves are harvested at 4″–6″ tall for mesclun.
Variety Information: LEAF LETTUCES: ‘LOLLA ROSA’: Deeply curled leaves with very frilly, red edges. ‘OAK LEAF’: Medium green, deeply lobed, oak leaf-shaped leaves with mild flavor, and slower to bolt. ‘BLACK SEEDED SIMPSON’: Crinkled, light green, crisp leaves with frilly edges. SUMMER BIBB LETTUCE: Soft, slightly crumpled light-green leaves in a loose head, often with a creamy yellow core. GREENS: ARUGULA (rocket salad): Medium green, deeply lobed leaves are rich and peppery with a hint of nut. MUSTARD, ‘MIZUNA’: Thin stems, serrated light green leaves with slightly peppery, mildly spicy flavor. BOK CHOY, ‘TATSOI’: Thick, dark green leaves with a milder flavor than western head cabbage.