Lactuca sativa Early Great Lakes is a head lettuce with bright green outer leaves and creamy inner leaves. Heavy medium to large heads grow round and tightly folded in cool weather. Approx. 850-900 seeds Plant in moist, well drained soil, as soon as ground can be worked and danger of frost has passed. For an earlier crop, start indoors 4-5 weeks before the last frost. Planting Depth:1.3 cm (1/2\”) PlantingSpacing:20 cm (8\”) Row Spacing:45 cm (18\”)