DibbleWhen to plant collard greens in Zone 6
In Zone 6, the last spring frost usually passes around April 21 and the first fall frost arrives around October 17, leaving about 179 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Generous season. Spring and fall plantings both productive.
Planting windows for collard greens in Zone 6
| Task | Window |
|---|---|
| Start seeds indoors | Mar 10 to Mar 24 |
| Transplant | Apr 7 to Apr 21 |
| Estimated harvest | Jun 6 to Sep 4 |
The harvest estimate counts 60 days to maturity, then a picking window of about 90 days. These windows use typical frost dates for Zone 6; Dibble pins them to your exact ZIP code.
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How to grow collard greens
Start indoors 6 weeks before last frost and transplant 2 weeks before. Heat- and cold-tolerant, pick the lower leaves for months.
Companion plants
Good neighbors for Collard Greens:
Better kept apart:
Collard Greens in nearby zones
Keep exploring
Collard Greens: the full growing guide · The Zone 6 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.