When to plant hyssop in Indiana
Indiana spans USDA zones 5b–7a, so the right time to plant hyssop shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 29 in Evansville to May 2 in Auburn — below are local dates for 86 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Indianapolis | 6b | April 20 | October 21 | April 20 – May 4 |
| Fort Wayne | 6a | April 24 | October 21 | April 24 – May 8 |
| Evansville | 7a | March 29 | November 10 | March 29 – April 12 |
| South Bend | 6a | April 23 | October 23 | April 23 – May 7 |
| Fishers | 6a | April 21 | October 21 | April 21 – May 5 |
| Carmel | 6a | April 21 | October 21 | April 21 – May 5 |
| Bloomington | 6b | April 15 | October 26 | April 15 – April 29 |
| Hammond | 6a | April 23 | October 20 | April 23 – May 7 |
Hyssop in Indiana: FAQ
When can I plant hyssop in Indiana?
Across Indiana, the time to transplant hyssop spans roughly March 29 in Evansville to May 2 in Auburn, each following that city's local frost dates.
Does the hyssop planting date vary across Indiana?
Yes. Indiana publishes 86 cities with their own frost dates, so the right hyssop 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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