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Can You Grow Horseradish in California?

US · USDA Zone 9b · zones 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b

Won't grow here

Horseradish needs cold to develop its signature bite — in very warm zones it stays mild and spreads rampantly.

Plant zones

3a–9a

California last frost

mid-January

California first frost

late December

Days to harvest

300–365 days

When to plant Horseradishes in California

Direct sow

Oct 1 – Oct 31

Harvest

Jun – Jul (following year)

Dates are approximate, based on California'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 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.

See what grows well in California →

Frequently asked questions

Can you grow Horseradish in California?

Horseradish needs cold to develop its signature bite — in very warm zones it stays mild and spreads rampantly.

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 Horseradishes in California?

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