When to Plant Choy Sum in Zone 6
In USDA zone 6a, plant outdoors April 11 to May 26, and expect your first harvest around May 26. Zone 6 also has a fall planting window opening around August 15. (6a shown here — see 6a and 6b dates separately below.)
Choy Sum planting calendar for USDA Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
spring planting
Direct sow
Apr 11
Projected first harvest
May 26
fall planting
Direct sow
Aug 15
Projected first harvest
Sep 29
spring planting
fall planting
Choy Sum is ready to harvest in about 45 days, needing roughly 168 frost-free days in zone 6a.
Choy Sum planting calendar for USDA Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
spring planting
Direct sow
Apr 6
Projected first harvest
May 21
fall planting
Direct sow
Aug 20
Projected first harvest
Oct 4
spring planting
fall planting
Choy Sum is ready to harvest in about 45 days, needing roughly 178 frost-free days in zone 6b.
Not sure whether you're in 6a or 6b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
1 variety of choy sum in the HomeSown library. Tap any for its full grow guide.
Common problems with choy sum
What to watch for, with identification and treatment for each
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