When to plant cardoon in District of Columbia
District of Columbia spans USDA zone 8a, so the right time to plant cardoon shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 29 in Washington to March 29 in Washington — below are local dates for 1 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Washington | 8a | March 29 | November 8 | March 29 – April 12 |
Cardoon in District of Columbia: FAQ
When can I plant cardoon in District of Columbia?
Across District of Columbia, the time to transplant cardoon spans roughly March 29 in Washington to March 29 in Washington, each following that city's local frost dates.
Does the cardoon planting date vary across District of Columbia?
Yes. District of Columbia publishes 1 cities with their own frost dates, so the right cardoon planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
How long does cardoon take to grow in District of Columbia?
Cardoon takes about 120–150 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.
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