When to plant Dahlia in Zone 8b
In Zone 8b, Dahlia: start seeds indoors around Feb 15–Mar 1; transplant outdoors around Mar 22–Mar 29. Expect to harvest around Jun 30–Jul 7.
| Step | When |
|---|---|
| Start seeds indoors | Feb 15 – Mar 1 |
| Transplant outdoors | Mar 22 – Mar 29 |
| Harvest | Jun 30 – Jul 7 |
Tip: Plant tubers after frost. In cold zones, lift and store them indoors over winter.
Zone 8b averages a last spring frost around Mar 15 and a first fall frost around Nov 25. These are zone averages — look up your ZIP for your exact area.
See the full Zone 8b calendar in the tool →