Tree Dahlia
Dahlia imperialis 'Bell Tree Dahlia'
Essentials
At a Glance
Plant Type
Perennial
Height
180 inches
Width
48 inches
Light
Full Sun, Partial Sun
Zones
9
Water
Moderate
Humidity
Average
Lifespan
Perennial in suitable zones
Native To
Central America
Toxicity
Toxic to pets
The Story
Plant Bio
Tall and arching stems with large, showy flowers. Known for its unique tree-like structure and ability to produce blooms in late summer.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Plant tubers in well-draining soil in early spring after the last frost.
- Tuck tubers 4-6 inches deep and space them 18-24 inches apart.
- Water thoroughly after planting to settle soil around roots.
- Provide full sun to ensure vibrant blooms and healthy growth.
- Fertilize monthly with a balanced fertilizer during the growing season.
- Stake tall varieties to support heavy flower heads and prevent wind damage.
Pro Tip
Mulch around the plant to retain moisture and suppress weeds, especially in hot climates.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist but not waterlogged 🌱
- Apply a balanced fertilizer monthly during active growth
- Stake tall varieties to support heavy blooms
Don't
- Avoid overwatering to prevent tuber rot ❌
- Do not disturb tubers during dormancy
- Refrain from fertilizing late in the season to prevent weak growth
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Lift Store | ||||||||||||
| Plant | ||||||||||||
| Stake |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Tree Dahlia questions
What zones can Tree Dahlia grow in?
Tree Dahlia is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Tree Dahlia deer resistant?
Not reliably. Deer may browse Tree Dahlia, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Tree Dahlia bloom?
Tree Dahlia typically blooms in autumn through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Tree Dahlia need full sun?
Tree Dahlia does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Dahlia to compare
Dahlia
Dahlia variabilis
Dinnerplate Dahlia
Dahlia x pinnata 'Dinnerplate Cutting Blend'
Dahlia
Dahlia variabilis 'Hart'
Babette Giant Ball Dahlia
Dahlia x pinnata 'Babette Giant Ball'
Lady Darlene Dahlia
Dahlia x pinnata 'Lady Darlene'
Mrs. Eileen Dahlia
Dahlia spetabilis 'Mrs Eileen'
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Tree Dahlia with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
