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Leek Mammoth Blanch (RHS Award of Garden Merit)
RHS Award. EXHIBITION.
Mammoth Blanch is a superior exhibition variety with extra long white blanch and thick, broad flag. Sow from mid-January to early March at 15°C. Do not overwater seedlings as this may cause damping off. Harden off and plant out from early May.
The leek is the most important ingredient in two of the world famous soups; Scotland's cock-a-leekie and France's crème vichyssoise.
Product Part Number: 18163
When to sow
When to Sow Mammoth Blanch Leek Seeds
January to February under glass or March to April outdoors.
Where to Sow
Early sowings can be made under glass at 14C . Sow the seed into pots or trays and cover the seed with a sprinkling of compost or vermiculite. For Outdoor sowings , sow the seed thinly, 1.5cm (1/2in) deep in drills 30cm (12in) apart in soil which has been raked to a fine tilth. Water ground regularly, especially during dry periods.
What to do next
Once early sowings have germinated transplant into individual pots and grow on under glass until April before moving to a cold frame to harden off before planting out at 25-30cm (10-12in) apart in the row and 45cm (18in) between rows. Outdoor sowings once large enough to handle , carefully lift plants and transplant to the same spacings as above using a trowel or dibber, and water in.
November to February
Keep watered during dry weather. Earth up the stems during the growing season to increase the length of the blanched stem. For larger leeks for kitchen or exhibition, increase the spacing to 30-45cm (12-18in) between the plants.
High in potassium and folic acid and a good source of Vitamins A and C.