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Can You Grow Cauliflower in New Hampshire?
US · USDA Zone 5b · zones 4a, 4b, 5a, 5b, 6a
Cauliflower grows well here if you time it for your cool season — fall crops are often more reliable than spring.
Plant zones
New Hampshire last frost
New Hampshire first frost
Days to harvest
When to plant Cauliflowers 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 Cauliflower
Cauliflower is one of the most rewarding cool-season brassicas — and one of the trickiest. It forms a dense white head that needs steady cool weather and consistent moisture.
Start indoors 6 weeks before last frost; transplant 2-3 weeks before last frost. Blanch heads by tying leaves over them once they're 2-3 inches across. Harvest before curds loosen.
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 Cauliflower in New Hampshire?
Cauliflower grows well here if you time it for your cool season — fall crops are often more reliable than spring.
What zone is New Hampshire?
New Hampshire spans USDA Zone 5b (4a, 4b, 5a, 5b, 6a).
When do you plant Cauliflowers in New Hampshire?
Plant Cauliflowers around early April (start indoors Feb 23), harvest Jun 6 – Jul 16.