When to Plant Adzuki Bean in Zone 4
In USDA zone 4a, plant outdoors May 29 to September 20. (4a shown here — see 4a and 4b dates separately below.)
Adzuki Bean planting calendar for USDA Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
Direct sow
May 29
Adzuki Bean needs about 120 days to mature — longer than zone 4atypically stays frost-free, so it likely won't reliably ripen there outdoors without a head start indoors or season extension.
Adzuki Bean planting calendar for USDA Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
Direct sow
May 24
Projected first harvest
Sep 21
Adzuki Bean is ready to harvest in about 120 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 adzuki bean in the HomeSown library. Tap any for its full grow guide.
Common problems with adzuki bean
What to watch for, with identification and treatment for each
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