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Can You Grow Florence Fennel in New Hampshire?

US · USDA Zone 5b · zones 4a, 4b, 5a, 5b, 6a

Grows well here

Florence fennel grows well here — it likes warm days and cool nights for bulb development.

Plant zones

4a–9b

New Hampshire last frost

early April

New Hampshire first frost

late October

Days to harvest

65–90 days

When to plant Florence Fennels in New Hampshire

Direct sow

Apr 7

Harvest

Jun 11 – Jul 6

Dates are approximate, based on New Hampshire's average frost dates. Your exact yard may vary by microclimate.

About Florence Fennel

Florence fennel produces an anise-flavored bulb at the base — sliced raw into salads or roasted, it is a Mediterranean staple. Note: fennel inhibits nearby plant growth, so keep it isolated in the garden.

Direct sow after last frost — fennel dislikes transplanting. Sow 1/4 inch deep, thin to 12 inches. Keep soil consistently moist while bulbing. Harvest when bulbs are 3 inches wide. Do NOT plant near tomatoes or peppers.

Full florence fennel growing guide →

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.