Winter-Green Leek (Allium ampeloprasum var. porrum)
A large winter-hardy leek. Dark green leaves, and a white stock up to 2 thick by 12 long with little bulbing. Makes abundant seed. Sow seeds in flats in February; transplant into trench in very fertile soil in April. Largest transplants make the largest leeks. Gradually fill trench to blanch stocks. Harvest December to April.