Leek 'Mercurian' F1 Hybrid - SeedsAllium porum

Sow indoors 4-5 seeds in 5cm (2”) pots or used vending cups, or very thinly in a seed tray of good quality seed compost. Cover with 6mm (1?4in) of vermiculite or compost, and maintain at a temperature of 15- 20C (59-68F) until germination, which usually takes 14 -21 days. Once germinated, grow leek plants on in cool conditions.

Alternatively, sow thinly directly outside, 1cm (1/2”) deep in drills 30cm (12”) 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 at a spacing of 23-25cm (9-10”) apart and 45cm (18”) between rows, using a trowel or dibber, and water in.

Cover with a protective netting or fleece to prevent attack from birds and insects. Water the plants thoroughly after planting. Keep watered during dry weather. Earth up the stems during the growing season to increase the length of the blanched stem.

High in folic acid, potassium, pro-vitamin A and vitamin C. Contains beneficial sulphur compounds, as well as a potent antioxidant called quercetin.

Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes, etc. are delivered at the appropriate time for planting or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £2.99.

Orders which include any other products will incur a delivery charge of £6.99.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £7.99 will apply - regardless of the number of items ordered.

Large items may incur a higher delivery charge - this will be displayed in your shopping basket.

Please see our Delivery page for further details, and more information on different charges that may apply to certain destinations.

For more information on how we send your plants please visit our Helpful Guide on plant sizes.