Sensational compact Cos lettuce with dark green leaves and Nasonovia Aphid resistance. How To Sow: Choose a well drained site in full sun. Best sown into seed trays for subsequent transplanting or, after frosts, sow direct where to grow in a well-prepared seedbed. Sow seeds 2 cm apart, in rows 35cm apart and to a depth of 5 mm. Later, transplant or thin to 30 cm apart. Seedling Care: Keep seedbed or trays evenly moist during the germination period of 7-14 days.