Paris Island Cos , romaine lettuce

.5g approx 525 seeds per package 
Flavourful pale centres are surrounded by thick green outer leaves on enormous upright plants. Parris Island Cos romaine lettuce seeds can be planted close together for a long harvest of little leaves for gourmet salads. Given space and time to grow to full size, Parris Island forms huge heads up to 30cm (12") tall, but even at this crazy size, the leaves are tender and succulent, with mild flavour. Dating back to 1952, this heirloom lettuce is named after the actual Parris Island off the coast of South Carolina. Parris Island Cos is tipburn and mosaic tolerant. Winner of the RHS Award of Garden Merit.
Matures in 75 days. (Open-pollinated seeds)
Romaine
Very nice texture
Heirloom from 1952
Pale centres on large, upright plants
Lettuce grows best in cool weather in the spring and fall, but it can be grown in the summer, and into fall. Sow short rows every 2-3 weeks following the last average frost date for a continual harvest. Using a cloche, cold frame, or greenhouse over mid-late summer plantings can extend the harvest period right into winter. Optimal soil temperature for germination: 10-22°C (50-72°F). Seeds should sprout in 7-15 days, depending on conditions. Lettuce seeds don’t sprout easily when the soil temperature is over 22°C (72°F) in summer. Get around this by sprouting them indoors in a cool area, or pre-sprout by sprinkling seeds on a damp paper towel and placing it in a plastic bag in the fridge for a few days. In hot weather most lettuce goes to seed rapidly, so have new plantings ready to go, and watch for "good resistance to bolting" in the product description.
Starting
Direct sow or start indoors and transplant. Sow seeds 5mm (¼”) deep, or on the surface of the soil where the soil can be kept evenly moist.. Space or thin heading lettuce to 30cm (12″) apart. Space or thin looseleaf varieties to 20-25cm (8-10″) apart. Space rows for all types 45-90cm (18-36″) apart. Babyleaf lettuce can be planted quite densely, as it is harvested at an immature size. Sowing babyleaf lettuce seeds closely together in narrow rows makes harvesting simpler.