Chives are considered a cool-season crop, which means that they grow best in the spring and fall. The harsher temperatures of summer usually cause them to go dormant until cool weather arrives again.
For a head start in colder regions, start chive seeds indoors 6 to 8 weeks before the last spring frost. (See local frost dates.) Transplants need good growth before being set in the garden.
Outdoors, sow seeds as soon as the soil is workable in the spring. Note that they can take a few weeks to germinate, so don’t panic! For the best germination and growth, the temperature of the soil should be between 60º and 70ºF (15º and 21ºC).
Plant transplants outdoors once the threat of frost has passed.
CHOOSING AND PREPARING THE PLANTING SITE
Chives grow best in full sun, though they will tolerate light shade.
Soil needs to be moist, fertile, rich, and well-draining. Before planting, incorporate 4 to 6 inches of well-composted organic matter. Work compost into the soil to a depth of 6 to 8 inches. (Read more about soil amendments and preparing soil for planting.)
HOW TO PLANT CHIVES
Sow seeds about 2 inches apart and no more than ¼ inch deep. Cover with a thin layer of soil.
Once seedlings emerge, thin so that plants are spaced between 4 to 6 inches apart in all directions.