When to Plant Komatsuna in Zone 9
In USDA zone 9a, plant outdoors February 15 to March 27, and expect your first harvest around March 27. Zone 9 also has a fall planting window opening around October 6. (9a shown here — see 9a and 9b dates separately below.)
Komatsuna planting calendar for USDA Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
spring planting
Direct sow
Feb 15
Projected first harvest
Mar 27
fall planting
Direct sow
Oct 6
Projected first harvest
Nov 15
spring planting
fall planting
Komatsuna is ready to harvest in about 40 days, needing roughly 275 frost-free days in zone 9a.
Komatsuna planting calendar for USDA Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
spring planting
Direct sow
Feb 1
Projected first harvest
Mar 13
fall planting
Direct sow
Oct 20
Projected first harvest
Nov 29
spring planting
fall planting
Komatsuna is ready to harvest in about 40 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 komatsuna in the HomeSown library. Tap any for its full grow guide.
Common problems with komatsuna
What to watch for, with identification and treatment for each
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