Home › Onion › Grow in California
Can You Grow Onion in California?
US · USDA Zone 9b · zones 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b
Onions grow well here — plant sets or transplants in early spring for a summer harvest.
Plant zones
California last frost
California first frost
Days to harvest
When to plant Onions in California
Start indoors
Transplant
Harvest
Dates are approximate, based on California's average frost dates. Your exact yard may vary by microclimate.
About Onion
Onions are a staple crop that stores well and can be grown as sets transplants or from seed.
Growing from sets is easiest for beginners. Plant in early spring — onions are frost-tolerant. Day-length sensitive — choose short-day long-day or day-neutral varieties based on your latitude.
Gardening in California
California spans more climate zones than any other state. Coastal regions are mild year-round; the Central Valley is hot and productive; mountains are cold; deserts are extreme.
Frequently asked questions
Can you grow Onion in California?
Onions grow well here — plant sets or transplants in early spring for a summer harvest.
What zone is California?
California spans USDA Zone 9b (5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b).
When do you plant Onions in California?
Plant Onions around mid-January (start indoors Jan 1), harvest Apr 10 – May 10.