When to Plant Horseradish in Zone 4
In USDA zone 4a, plant outdoors May 15 to November 11, and expect your first harvest around November 11. (4a shown here — see 4a and 4b dates separately below.)
Horseradish planting calendar for USDA Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
Direct sow
May 15
Projected first harvest
Nov 11
Horseradish is ready to harvest in about 180 days, needing roughly 128 frost-free days in zone 4a.
Horseradish planting calendar for USDA Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
Direct sow
May 10
Projected first harvest
Nov 6
Horseradish is ready to harvest in about 180 days, needing roughly 138 frost-free days in zone 4b.
Not sure whether you're in 4a or 4b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
1 variety of horseradish in the HomeSown library. Tap any for its full grow guide.
Common problems with horseradish
What to watch for, with identification and treatment for each
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