When to Plant Bok Choy in Zone 4
In USDA zone 4, start seeds indoors around April 17, transplant or plant outdoors May 1 to June 20, and expect your first harvest around June 20. Zone 4 also has a fall planting window opening around July 19.
Bok Choy planting calendar for USDA Zone 4
spring planting
Start seeds indoors
Apr 17
Transplant outdoors
May 1
Projected first harvest
Jun 20
fall planting
Direct sow
Jul 19
Projected first harvest
Sep 7
spring planting
fall planting
Bok Choy is ready to harvest in about 50 days. Dates use USDA zone 4a average frost dates. Set your ZIP in HomeSown for dates tuned to your exact location.
What zone 4 means for bok choy
Average last spring frost
May 15
Average first fall frost
September 20
Those two dates are what set the schedule above. Zone 4 gives you roughly 128 frost-free days, and bok choy need about 50 days to mature.
Varieties to grow
1 variety of bok choy in the HomeSown library. Tap any for its full grow guide.
Common problems with bok choy
What to watch for, with identification and treatment for each
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