Approximately 1036 seeds per gram. Lactuca sativa Lot# LT28126 Parris Island Cos Romaine Lettuce is an Heirloom Lettuce that is a popular dark-green strain of Cos lettuce. Parris Island forms 25-30 cm (10"-12”) heads of slightly savoyed, dark green leaves with a creamy yellow white heart. Parris Island Lettuce has resistance to tip burn, tolerance to mosaic virus, and has medium resistance to bolting. Lettuce grows best in cool weather. Parris Island Cos is a highly adaptable lettuce for continued plantings throughout the growing season.
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 5mm-12mm (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 to 20°C, 59 to 68° F. Thin to space seedlings to 30cm (12") apart. Space or thin loose leaf varieties to 15cm (6”) apart. Row spacing for all lettuce types should between 30-40cm (12-16”) apart.
Soil Conditions: Well worked rich, loose well-drained soil. Ideal pH: 6.5-7.0..
Planting Depth: Sow Lettuce seeds at 6mm-12mm (¼-½") deep. Lettuce germination requires sunlight. Surface sow seeds and barely cover with soil medium.
Germination: 7-14 days.
Height at Maturity:25-30 cm (10-12") tall. Spread: 18-20 cm (7-8”) across.
Days to Maturity: 21 days for leaves. 77 days for heads.
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.Parris Island Cos Romaine Lettuce plants require almost constantly moist ground. This is particularly important when the lettuces are one or two weeks away from harvesting, as dry soil now will cause the plants to bolt and their energy into producing flowers.
Sun/Shade: Full Sun
Spacing after Thinning: Thin to one plant every 25 cm (10”). Rows should be 30-40 cm (12-16”) apart.
Additional Information Open pollinated-untreated seeds. Parris Island Cos Romaine Lettuce is one of the easiest crops to grow. Seeds germinate quickly and plants grow with little fuss. In most areas, you can grow successive crops in spring and autumn and in mild coastal areas, it can be grown year-round. It is a widely adapted Romaine type lettuce that produces an upright head of strong leaves, with a distinctive crisp white midrib. Known as a favorite of both market growers and home gardeners, it is heat tolerant with fair bolt resistance. They are usually grown to full size to harvest, although they are becoming more popular for baby or young leaf use. Parris Island Cos grows on 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.