Annual flower
Dahlia plant profile
Dahlia spp.
An annual flower for full sun.
Last updated .
When to plant
When to plant Dahlia
Transplant outdoors
at your last spring frost to 2 weeks after your last spring frost
Growing conditions
- Sun
- Full sun
- Planting depth
- 4 in
- Lifecycle
- Annual
Common problems
Watch for these
Also watch for: deer browsing, tuber storage rot.
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- The Dirt on Dahlias
Penn State Extension. Supports outdoor transplant timing (normalized). Checked 2026-06-11.