When to plant Dahlia in Zone 8a
In Zone 8a, Dahlia: start seeds indoors around Feb 22–Mar 8; transplant outdoors around Mar 29–Apr 5. Expect to harvest around Jul 7–Jul 14.
| Step | When |
|---|---|
| Start seeds indoors | Feb 22 – Mar 8 |
| Transplant outdoors | Mar 29 – Apr 5 |
| Harvest | Jul 7 – Jul 14 |
Tip: Plant tubers after frost. In cold zones, lift and store them indoors over winter.
Zone 8a averages a last spring frost around Mar 22 and a first fall frost around Nov 18. These are zone averages — look up your ZIP for your exact area.
See the full Zone 8a calendar in the tool →