They're generally hardy in U.S. Department of Agriculture Plant Hardiness Zones 4 through 9. Most ornamental onions are sold ...

Considered one of the oldest cultivated plants, onions are thought to have originated in Central Asia. Green onions, also ...

Onions can begin to grow outdoors in March ... Summer flowering plants Bulbs of summer flowering plants can be planted indoors two to three inches deep in six-inch pots. Some summer flowering ...