Lactuca sativa, Grandpa's Traditional English Crisphead, Lactuca sativa - Grandpa's very old favourite and perhaps the best-known variety of all, with this very crisp, sweet & pleasing crisp head strain. Stands for hot weather very well and is slow to bolt. Very Robust heads with crumpled leaves and large, solid hearts. The fine distinct flavour and good texture. Crisphead, 65-70 days. (Can be Cut & come again), Seed Count Approx - 350 avg SOWING - Sowings can be made under glass, sow seeds into pots or trays of seed sowing compost at a temperature of 15-20C and lightly cover seeds with a sprinkling of vermiculite or compost. Alternatively, sow seeds from April thinly along rows 1.5cm (1/2in) deep and 30cm (12in) apart direct in the vegetable plot.