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Can You Grow Horseradish in New Hampshire?

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

Grows well here

Horseradish grows well here and is virtually impossible to kill — a great low-effort perennial.

Plant zones

3a–9a

New Hampshire last frost

early April

New Hampshire first frost

late October

Days to harvest

300–365 days

When to plant Horseradishes in New Hampshire

Direct sow

Oct 1 – Oct 31

Harvest

Jun – Jul (following year)

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

About Horseradish

Horseradish is a vigorous, nearly indestructible perennial grown for its pungent taproot — the fresh stuff blows store-bought away. Plant it where you want it to stay.

Plant root cuttings in spring, burying on a slight angle. Harvest roots in fall after a few frosts for best heat. It spreads — contain it in a pot or dedicated bed.

Full horseradish 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.

See what grows well in New Hampshire →

Frequently asked questions

Can you grow Horseradish in New Hampshire?

Horseradish grows well here and is virtually impossible to kill — a great low-effort perennial.

What zone is New Hampshire?

New Hampshire spans USDA Zone 5b (4a, 4b, 5a, 5b, 6a).

When do you plant Horseradishes in New Hampshire?

Plant Horseradishes Oct 1 – Oct 31, harvest Jun – Jul (following year).