When to Plant Choy Sum in North Dakota
North Dakota spans USDA hardiness 3b to 4b (zones 3b to 4b on this page). Plant choy sum by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 3b · Zone 4a · Zone 4b
Choy Sum planting calendar for North Dakota, Zone 3b
Average last spring frost
May 20
Average first fall frost
September 15
spring planting
Direct sow
May 6
Projected first harvest
Jun 20
fall planting
Direct sow
Jul 21
Projected first harvest
Sep 4
spring planting
fall planting
Choy Sum is ready to harvest in about 45 days. Full zone 3 guide (both 3a and 3b) →
Choy Sum planting calendar for North Dakota, Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
spring planting
Direct sow
May 1
Projected first harvest
Jun 15
fall planting
Direct sow
Jul 26
Projected first harvest
Sep 9
spring planting
fall planting
Choy Sum is ready to harvest in about 45 days. Full zone 4 guide (both 4a and 4b) →
Choy Sum planting calendar for North Dakota, Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
spring planting
Direct sow
Apr 26
Projected first harvest
Jun 10
fall planting
Direct sow
Jul 31
Projected first harvest
Sep 14
spring planting
fall planting
Choy Sum is ready to harvest in about 45 days. Full zone 4 guide (both 4a and 4b) →
Not sure which half-zone you're in? 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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