Horseradish

Horseradish

Armoracia rusticana

Plant out 4 weeks before your last spring frost. Space plants 12 in (30 cm) apart.

Photo: Anna reg, CC BY-SA 3.0 · source

When to plant

Timed from your frost dates, so it holds wherever you garden. Give yours and every step below becomes a date.

See the dates for your garden

Enter your average last spring frost and first fall frost. Every timing on this site turns into a calendar date. Not sure of yours? Your local extension service or a search for “last frost date” and your town will tell you; the app finds them from your location.

Last spring frost
First fall frost

Saved in this browser only. Nothing is sent anywhere.

Optimal Spring Planting (Root Cuttings)

RootRecommended
  1. Plant out4 weeks before your last spring frost
  2. First harvestabout 7 months after planting out

Growing horseradish

Spacing in the row
12 in (30 cm)
Between rows
30 in (76 cm)
Planting depth
Root cuttings flat end up, slanted 45°, top 2-3 inches below the soil
Sun
Full Sun
Life cycle
Perennial

Feeding

How often
At planting only. Mix a complete fertilizer into the soil before planting; too much nitrogen or fresh manure gives heavy tops and forked, poor roots.

Your horseradish, planned to the day.

Canopy turns these timings into dates from your own frost data, places every plant at its spacing on your garden map, and tracks it all the way to harvest.

Add horseradish to your planting calendar →

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