DibbleWhen to plant tulip in Zone 4
In Zone 4, the last spring frost usually passes around May 10 and the first fall frost arrives around September 21, leaving about 134 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Cool climate with a brief warm window. Indoor starts and season extension help.
Planting windows for tulip in Zone 4
| Task | Window |
|---|---|
| Plant bulbs | Aug 10 to Aug 24 |
| Estimated harvest | Dec 8 to Dec 29 |
The harvest estimate counts 120 days to maturity, then a picking window of about 21 days. These windows use typical frost dates for Zone 4; Dibble pins them to your exact ZIP code.
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How to grow tulip
Plant tulip bulbs 6 weeks before your first fall frost, pointy end up, so roots establish before winter. They bloom the following spring.
Companion plants
Good neighbors for Tulip:
Tulip in nearby zones
Keep exploring
Tulip: the full growing guide · The Zone 4 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.