DibbleWhen to plant bok choy in Zone 3
In Zone 3, the last spring frost usually passes around May 15 and the first fall frost arrives around September 15, leaving about 123 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Short, cool season. Start most warm crops indoors and protect from late frosts.
Planting windows for bok choy in Zone 3
| Task | Window |
|---|---|
| Direct sow | May 1 to May 15 |
| Estimated harvest | Jun 15 to Jul 6 |
The harvest estimate counts 45 days to maturity, then a picking window of about 21 days. These windows use typical frost dates for Zone 3; Dibble pins them to your exact ZIP code.
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How to grow bok choy
Sow a couple of weeks before last frost, and again in late summer. It bolts in heat, so favor spring and fall.
Companion plants
Good neighbors for Bok Choy:
Better kept apart:
Bok Choy in nearby zones
Keep exploring
Bok Choy: the full growing guide · The Zone 3 planting calendar · Every crop and zone
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Dates are estimates based on typical frost dates for the zone. Your yard has its own microclimate, so use them as a starting point and adjust as you learn your space.