Approximately 1036 seeds per gram. Lactuca sativa Lot# LT28103 Black Seed Simpson Lettuce is a highly adaptable lettuce for continued plantings throughout the season. It quickly produces a full-sized, bright green open head with slightly crinkled leaves. A very popular baby leaf variety for a bright green contrasting leaf in salad mixes. It is a reliable leaf lettuce type that is heat resistant, slow to bolt and has very dependable production. The leaves are light green, tender, large, lightly crispy and slightly ruffled. Harvest leaves when plant is able to sustain harvesting. Baby green leaves are available within 28 days while full sized leaves will take up to 45 days.
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 15 cm (6”) apart. Row spacing for all lettuce types should 30 cm (12”) apart.
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:23-38 cm (9-15") tall. Spread: 15-20 cm (6-8”) across.
Days to Maturity: 28 days for baby leaves. 45 days for mature leaves.
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 15 cm (6”). Rows should be 30 cm (12”) apart.
Additional Information Open pollinated-untreated seeds. Black Seeded Simpson Lettuce grows with a stemless-like growth habit. It is a low maintenance plant and it is great lettuce for beginning gardeners and those who like gardens that don't need much overseeing. The leaves are a good source of antioxidants such as beta-carotene, lutein and vitamin C as well as vitamin K.