Vegetable Garden: Growing Cool-Season Vegetables
Cool-Season Vegetable #7: Onions
One of the hardiest of vegetables, onions can be planted as soon as the ground can be worked in the spring. Most easily grown from sets (partially-grown bulbs), onions form large bulbs according to the temperature and length of daylight.
Long-day onions are recommended for northern climates, where the appropriate temperatures don’t arrive until the longer days closer to summer. Short-day onions are better for southern climates, where they can be grown during spring, fall, and winter.