When to plant rhubarb in Delaware
Delaware spans USDA zones 7a–7b, so the right time to plant rhubarb shifts by weeks across the state. The window to transplant seedlings outdoors runs from about February 21 in Dover to February 28 in Milford — below are local dates for 11 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Wilmington | 7b | April 7 | November 4 | February 24 – March 24 |
| Dover | 7b | April 4 | November 4 | February 21 – March 21 |
| Newark | 7b | April 7 | November 2 | February 24 – March 24 |
| Middletown | 7b | April 7 | November 2 | February 24 – March 24 |
| Bear | 7b | April 7 | November 2 | February 24 – March 24 |
| Glasgow | 7b | April 7 | November 2 | February 24 – March 24 |
| Brookside | 7b | April 7 | November 2 | February 24 – March 24 |
| Hockessin | 7a | April 7 | November 4 | February 24 – March 24 |
Rhubarb in Delaware: FAQ
When can I plant rhubarb in Delaware?
Across Delaware, the time to transplant rhubarb spans roughly February 21 in Dover to February 28 in Milford, each following that city's local frost dates.
Does the rhubarb planting date vary across Delaware?
Yes. Delaware publishes 11 cities with their own frost dates, so the right rhubarb planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
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