When to plant fennel (bulb) in Oklahoma
Oklahoma spans USDA zones 6b–8a, so the right time to plant fennel (bulb) shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 1 in Ardmore to April 4 in Guymon — below are local dates for 45 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Oklahoma City | 7b | April 4 | November 2 | March 21 – April 4 |
| Tulsa | 7b | March 31 | November 4 | March 17 – March 31 |
| Norman | 7b | April 3 | November 3 | March 20 – April 3 |
| Broken Arrow | 7b | April 1 | November 1 | March 18 – April 1 |
| Edmond | 7b | April 10 | October 28 | March 27 – April 10 |
| Lawton | 7b | March 26 | November 7 | March 12 – March 26 |
| Moore | 7b | March 31 | November 5 | March 17 – March 31 |
| Midwest City | 7b | April 2 | November 5 | March 19 – April 2 |
Fennel (Bulb) in Oklahoma: FAQ
When can I plant fennel (bulb) in Oklahoma?
Across Oklahoma, the time to transplant fennel (bulb) spans roughly March 1 in Ardmore to April 4 in Guymon, each following that city's local frost dates.
Does the fennel (bulb) planting date vary across Oklahoma?
Yes. Oklahoma publishes 45 cities with their own frost dates, so the right fennel (bulb) 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 fennel (bulb) take to grow in Oklahoma?
Fennel (Bulb) takes about 65–90 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.
Never miss a window in your area
An email when it’s time to start seeds, transplant, and sow — timed to your frost dates. Double opt-in, one-click unsubscribe, no spam.