Species
Dahlia cactusCactus Dahlia8 other cultivars
The Story
Plant Bio
Cactus dahlias are known for their spiky, unique petal shapes and vibrant blooms.
The Phantom features large, white to light cream flowers with a distinctive cactus-like form.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Bulb Corm Tuber
Height
36 inches
Width
24 inches
Light
Full Sun
Zones
6, 7, 8, 9
Water
Moderate
Humidity
Moderate
Lifespan
Perennial in suitable zones
Native To
Central America
Toxicity
Non-toxic
Bloom period
Mid-summer – Late summer
In flower about 2 months of the year
Planting
How to Grow
- Tuck seeds or tubers into well-draining soil in spring after last frost.
- Water consistently to keep soil moist but not waterlogged.
- Provide full sun for optimal flowering and growth.
- Pinch back young plants to encourage bushier growth.
- Fertilize every 4-6 weeks with a balanced fertilizer during the growing season.
- Deadhead spent flowers to promote continuous blooming.
Pro Tip
Use organic compost to enrich soil and promote healthy blooms.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil evenly moist 🌱
- Stake tall varieties to prevent lodging
- Apply a balanced fertilizer monthly during peak growth
Don't
- Avoid overwatering to prevent root rot ❌
- Don’t disturb tubers in fall after foliage dies back
- Refrain from fertilizing in late fall to avoid weak, leggy growth
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Lift Store | ||||||||||||
| Pinch | ||||||||||||
| Plant | ||||||||||||
| Stake |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Multiply
Propagation Methods
Good to Know
Common Questions
The Phantom Dahlia questions
What zones can The Phantom Dahlia grow in?
The Phantom Dahlia is hardy in USDA Zones 6–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is The Phantom Dahlia deer resistant?
Not reliably. Deer may browse The Phantom Dahlia, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does The Phantom Dahlia bloom?
The Phantom Dahlia typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does The Phantom Dahlia need full sun?
The Phantom Dahlia does best in full sun (6+ hours).
More Dahlia to compare
Dahlia
Dahlia variabilis
Dinnerplate Cutting Dahlia
Dahlia pinnata 'Dinnerplate Cutting Blend'
Hart Dahlia
Dahlia variabilis 'Hart'
Dahlia Mix
Dahlia x hybrida 'Mix'
Babette Giant Ball Dahlia
Dahlia pinnata 'Babette Giant Ball'
Lady Darlene Dahlia
Dahlia pinnata 'Lady Darlene'
Keep exploring
Explore the genus
Hardy in your zone?
Grow The Phantom 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.