Approximately 1036 seeds per gram. Lactuca sativa Lot# LT28154 Great Lakes Lettuce produces a large crisp iceberg type head of lettuce. It has an excellent flavour, making this a perfect selection for salads and sandwiches. It has large to medium green cabbage-like heads with light green centers. Leaves are shiny and lightly crumpled. It is very adaptable, heat tolerant, very hardy and resistant to scald and tip burn.
Lettuce seeds require light to germinate; hence they must be sown just barely below soil surface in full sun. Direct sow lettuce seeds or start indoors and transplant when the risk of frost has passed. Work soil loose and sow lettuce seeds 2-3 seeds at 5 mm-12 mm (¼-½") deep and barely cover with soil medium. Lettuce seeds will not germinate when soil temperatures exceed 30°C (87°F) and do best when soil temperatures remain between 15-20°C (59-68° F). Thin to space seedlings 30 cm (12") apart. Space or thin loose leaf varieties to 20-25 cm (8-10") apart. Row spacing for all lettuce types should between 45-90 cm (18-36") apart. Pick individual leaves when plant is able to support harvesting or wait and harvest full heads. Summer lettuce or leaf varieties stay in prime eating condition for only a short period. Harvest often and keep planting.
Soil Conditions: Well worked rich, loose well-drained soil. Ideal pH: 6.5-7.0.
Planting Depth: Sow Lettuce seeds at 6 mm-12 mm (¼-½") deep. Lettuce germination requires sunlight. Surface sow seeds and barely cover with soil medium.
Germination: 7-14 days.
Height at Maturity:20-30 cm (8-12") tall. Spread: 20-25 cm (8-10”) across.
Days to Maturity: 80-100 days for maturity.
Watering: 2.5 cm (1") of water a week ensures good growth. The amount of rain that falls during the week affects how much you should water your garden.
Sun/Shade: Full Sun
Spacing after Thinning: Thin to one plant every 45-61 cm (18-24”). Rows should be 45-61 cm (18-24”) apart.
Additional Information Open pollinated-untreated seeds. Leaves are crisp and tender. Great Lakes Lettuce leaves also have a wonderful flavor. Leaves are perfect for making sandwiches and adding to salads. Grow extra to harvest the young, crunchy, baby greens when thinning out. It has very good storage ability if kept refrigerated. The leaves are a good source of antioxidants such as beta-carotene, lutein and vitamin C as well as vitamin K.