Leek Musselburgh Improved is a very hardy and exceptionally fine strain of this popular mid season variety.Leeks prefer ordinary well drained soil in sun or semi-shade and can follow early peas or potatoes. Sow seeds in early spring outdoors in a well prepared seed bed. Sow seeds thinly 1cm (½in) deep in drills 23cm (9in) apart.In early summer lift the seedlings carefully and plant 15x38cm (6x15in) apart, making 15cm (6in) deep holes and inserting the seedlings as far as the first leaf. Then fill the hole with water NOT SOIL. Earth up the stems as growth develops and harvest