When to plant Dahlia
Plant tubers after frost. In cold zones, lift and store them indoors over winter.
TypeFlowers
Frost toleranceTender (no frost)
Days to maturity~100
When to plant Dahlia by USDA zone
| Zone | When to plant |
|---|---|
| Zone 1a | Start seeds indoors May 18–Jun 1 Transplant outdoors Jun 22–Jun 29 |
| Zone 1b | Start seeds indoors May 13–May 27 Transplant outdoors Jun 17–Jun 24 |
| Zone 2a | Start seeds indoors May 8–May 22 Transplant outdoors Jun 12–Jun 19 |
| Zone 2b | Start seeds indoors May 2–May 16 Transplant outdoors Jun 6–Jun 13 |
| Zone 3a | Start seeds indoors Apr 27–May 11 Transplant outdoors Jun 1–Jun 8 |
| Zone 3b | Start seeds indoors Apr 22–May 6 Transplant outdoors May 27–Jun 3 |
| Zone 4a | Start seeds indoors Apr 17–May 1 Transplant outdoors May 22–May 29 |
| Zone 4b | Start seeds indoors Apr 12–Apr 26 Transplant outdoors May 17–May 24 |
| Zone 5a | Start seeds indoors Apr 7–Apr 21 Transplant outdoors May 12–May 19 |
| Zone 5b | Start seeds indoors Apr 2–Apr 16 Transplant outdoors May 7–May 14 |
| Zone 6a | Start seeds indoors Mar 24–Apr 7 Transplant outdoors Apr 28–May 5 |
| Zone 6b | Start seeds indoors Mar 18–Apr 1 Transplant outdoors Apr 22–Apr 29 |
| Zone 7a | Start seeds indoors Mar 10–Mar 24 Transplant outdoors Apr 14–Apr 21 |
| Zone 7b | Start seeds indoors Mar 4–Mar 18 Transplant outdoors Apr 8–Apr 15 |
| Zone 8a | Start seeds indoors Feb 22–Mar 8 Transplant outdoors Mar 29–Apr 5 |
| Zone 8b | Start seeds indoors Feb 15–Mar 1 Transplant outdoors Mar 22–Mar 29 |
| Zone 9a | Start seeds indoors Jan 31–Feb 14 Transplant outdoors Mar 7–Mar 14 |
| Zone 9b | Start seeds indoors Jan 18–Feb 1 Transplant outdoors Feb 22–Mar 1 |
| Zone 10a | Start seeds indoors Jan 3–Jan 17 Transplant outdoors Feb 7–Feb 14 |
| Zone 10b | Start seeds indoors Dec 18–Jan 1 Transplant outdoors Jan 22–Jan 29 |
| Zone 11a | Start seeds indoors Dec 4–Dec 18 Transplant outdoors Jan 8–Jan 15 |
| Zone 11b | Start seeds indoors Dec 4–Dec 18 Transplant outdoors Jan 8–Jan 15 |
| Zone 12a | Start seeds indoors Dec 4–Dec 18 Transplant outdoors Jan 8–Jan 15 |
| Zone 12b | Start seeds indoors Dec 4–Dec 18 Transplant outdoors Jan 8–Jan 15 |
| Zone 13a | Start seeds indoors Dec 4–Dec 18 Transplant outdoors Jan 8–Jan 15 |
| Zone 13b | Start seeds indoors Dec 4–Dec 18 Transplant outdoors Jan 8–Jan 15 |