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Can You Grow Onion in New Hampshire?
US · USDA Zone 5b · zones 4a, 4b, 5a, 5b, 6a
Onions grow well here — plant sets or transplants in early spring for a summer harvest.
Plant zones
New Hampshire last frost
New Hampshire first frost
Days to harvest
When to plant Onions in New Hampshire
Start indoors
Transplant
Harvest
Dates are approximate, based on New Hampshire'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 New Hampshire
New Hampshire has a humid continental climate. Coastal areas are Zone 5b-6a; northern mountains are Zone 4a-5a. Short growing seasons but productive for cool-season crops and berries.
Frequently asked questions
Can you grow Onion in New Hampshire?
Onions grow well here — plant sets or transplants in early spring for a summer harvest.
What zone is New Hampshire?
New Hampshire spans USDA Zone 5b (4a, 4b, 5a, 5b, 6a).
When do you plant Onions in New Hampshire?
Plant Onions around early April (start indoors Feb 9), harvest Jul 6 – Aug 5.