Sow indoors in flats with good potting soil February to April. Transplant into the garden in April or June, when plants are at least the size of a pencil lead. Space 6” in rows that are 1’ apart. Leeks benefit from frequent watering and shallow cultivation. Harvest as needed throughout autumn and winter.
To save seed, leave 20+ plants in the ground through the second spring and summer. Large globe shaped flowers attract pollinators. Isolate from other leeks by at least ½ mile.