When to plant rhubarb in Maryland
Maryland spans USDA zones 7a–8a, so the right time to plant rhubarb shifts by weeks across the state. The window to transplant seedlings outdoors runs from about February 8 in California to March 13 in Westminster — below are local dates for 139 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Baltimore | 8a | March 24 | November 21 | February 10 – March 10 |
| Columbia | 7b | April 5 | November 9 | February 22 – March 22 |
| Germantown | 7b | April 14 | October 29 | March 3 – March 31 |
| Frederick | 7b | April 2 | November 6 | February 19 – March 19 |
| Waldorf | 7b | April 17 | October 27 | March 6 – April 3 |
| Silver Spring | 7b | April 10 | November 1 | February 27 – March 27 |
| Ellicott City | 7b | April 2 | November 7 | February 19 – March 19 |
| Glen Burnie | 7b | April 10 | October 31 | February 27 – March 27 |
Rhubarb in Maryland: FAQ
When can I plant rhubarb in Maryland?
Across Maryland, the time to transplant rhubarb spans roughly February 8 in California to March 13 in Westminster, each following that city's local frost dates.
Does the rhubarb planting date vary across Maryland?
Yes. Maryland publishes 139 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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