Tree Dahlia
Dahlia imperialis 'Nepos'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
120 inches
Width
48 inches
Light
Full Sun, Partial Sun
Zones
8, 9
Water
Moderate
Humidity
Moderate
Lifespan
Perennial in warm zones
Native To
Mexico
Toxicity
Non-toxic
The Story
Plant Bio
Dahlia imperialis 'Nepos' is a tall, bushy perennial known for its striking flowers and ability to attract pollinators. This cultivar is particularly noted for its pink blooms and vigorous growth, making it a popular choice for borders and cutting gardens.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Select a sunny location with well-draining soil for planting.
- Tuck dahlia tubers 4-6 inches deep in the soil in early spring after the last frost.
- Water thoroughly after planting to settle the soil around the tubers.
- Mist cuttings or propagate by dividing tubers in early spring for new plants.
- Keep soil evenly moist but not waterlogged throughout the growing season.
- Fertilize monthly with a balanced fertilizer to promote healthy growth.
Pro Tip
Mulch around the plants to conserve moisture and suppress weeds for vibrant blooms.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist but not soggy 🌱
- Stake tall varieties to prevent flopping
- Remove spent flowers to encourage more blooms
- Apply a balanced fertilizer every 4-6 weeks
Don't
- Don’t overwater, as it can cause tuber rot ❌
- Avoid disturbing tubers during flowering
- Do not plant in poorly drained soil
- Refrain from pruning late in the season
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 8–10. 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 late summer 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'
Lady Darlene Dahlia
Dahlia x pinnata 'Lady Darlene'
Babette Giant Ball Dahlia
Dahlia x pinnata 'Babette Giant Ball'
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.
