Leeks are a hardy crop for autumn and winter harvest. They do not take up much space, and are generally easy to grow. Leeks can be harvested over a long period and they will stay in the ground in good conditions for many months. Their strong root system does wonders for soil structure.

Earlier cultivars for late summer and early summer are usually taller, slimmer and less hardy than later cultivars. Use shorter, fatter leek cultivars for late autumn and winter crops. A few cultivars have decorative purple foliage. Can be grown as mini leeks, a mild alternative to spring onion. Heirloom Leek - American Flag   is an old heirloom favorite.

Ideal Site- Leeks grow best in an open location with fertile soil that retains moisture, but does not become waterlogged in winter. Prior to planting prepare the site with high-fertility soil improver or medium-fertility soil improver if following a pea crop; or a low-fertility soil improver with a nitrogen-fixing organic fertilizer. The ideal soil pH is 6.5-7.5

Seed to Harvest- 16-20 weeks

Cultivation- The minimum germination temperature for leeks is 45F (7C). When sowing undercover multi sow leeks only. From February sow 4 seeds per cell. Plant out when 8in (20cm) tall, unthinned. When sowing directly outside, sow from March to May in a seedbed. Sow seeds 1in (2.5cm) deep, 1 x 6in (2.5 x 15cm). Transplant to final site. Sow mini-leeks directly in position, do not transplant

Planting- Transplant at 10-15 weeks old, 8in (20cm)- though they can be safely transplanted when larger. The main planting time is in June, but it can go on until early August. Water seedbed will before digging up transplants. Do not trim roots or leaves. Make holes 6in (15cm) deep. Drop a single leek into each hole and water. Do not fill in the hole.

Spacing- Rows, 3-6in x 12in (7.5-15cm x 30cm). Block Planting: 6-9in (15-23cm) each way. Multi-sown: 9in.(23cm). Mini-leeks- 1/4in x 6in (2cm- x 15cm)

Plant Care- Water until established during dry periods.