Fact Sheets no.
Onions adapt well to the home Garden and occupy little Garden space.
Onions do best in a fertile, well-drained Garden soil abundantly supplied with organic matter. Because onions are shallow-rooted, they require frequent irrigation. May. Onion species adapted to Colorado include bulb onions, green onions, chives, garlic, leeks and shallots. Chives are a perennial and will provide greens from early spring until late fall. The onion adapts well to the home Garden and occupies minimum Garden space.