The ideal leek for extra hardiness in winter, Leek ‘Blauwgroene Herfst- Murcia’ is a variety that can be harvested from October through to January. For best results, plant out from mid-June to mid-July and earth up from late August to help to increase the length of the tasty stems.Sow indoors 4-5 seeds in 5cm (2in) pots or used vending cups, or very thinly in a seed tray of good quality seed compost. Cover with 6mm (¼in) of vermiculite or compost, and maintain at a temperature of 15-20°C (59-68°F) until germination. Outside, sow thinly, 1cm (½in) deep in drills 30cm (12in) apart in soil which has been raked to a fine tilth.Carefully lift when plants are large enough to handle and transplant from mid-June to mid-July to 23-25cm (9-10in) apart in the row and 45cm (18in) between rows, using a trowel or dibber, and water in. Keep watered during dry weather. Earth up the stems during the growing season to increase the length of the blanched stem.