When to Plant Wasabi in Zone 4
In USDA zone 4a, plant outdoors May 15 to October 12, and expect your first harvest around October 12. (4a shown here — see 4a and 4b dates separately below.)
Wasabi 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
Oct 12
Wasabi is ready to harvest in about 150 days, needing roughly 128 frost-free days in zone 4a.
Wasabi 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
Oct 7
Wasabi is ready to harvest in about 150 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 wasabi in the HomeSown library. Tap any for its full grow guide.
Common problems with wasabi
What to watch for, with identification and treatment for each
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