When to plant Dahlia in Zone 7b
In Zone 7b, Dahlia: start seeds indoors around Mar 4–Mar 18; transplant outdoors around Apr 8–Apr 15. Expect to harvest around Jul 17–Jul 24.
| Step | When |
|---|---|
| Start seeds indoors | Mar 4 – Mar 18 |
| Transplant outdoors | Apr 8 – Apr 15 |
| Harvest | Jul 17 – Jul 24 |
Tip: Plant tubers after frost. In cold zones, lift and store them indoors over winter.
Zone 7b averages a last spring frost around Apr 1 and a first fall frost around Nov 10. These are zone averages — look up your ZIP for your exact area.
See the full Zone 7b calendar in the tool →