When to Plant Horseradish in Zone 9
In USDA zone 9a, plant outdoors March 1 to August 28, and expect your first harvest around August 28. (9a shown here — see 9a and 9b dates separately below.)
Horseradish planting calendar for USDA Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
Direct sow
Mar 1
Projected first harvest
Aug 28
Horseradish is ready to harvest in about 180 days, needing roughly 275 frost-free days in zone 9a.
Horseradish planting calendar for USDA Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
Direct sow
Feb 15
Projected first harvest
Aug 14
Horseradish is ready to harvest in about 180 days, needing roughly 303 frost-free days in zone 9b.
Not sure whether you're in 9a or 9b? 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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