The Story
Plant Bio
Dahlia spetabilis is known for its large, showy flowers and is a popular choice for garden displays. The plants are bushy and produce an abundance of blooms throughout the summer into fall.
This species is especially valued for its vibrant colors and unique flower shapes, often exhibiting combinations of colors that are striking in garden settings.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Perennial
Height
36 inches
Width
24 inches
Light
Full Sun, Partial Sun
Zones
8, 9, 10
Water
Moderate
Humidity
Moderate
Lifespan
Tender perennial, hardy in zones 8-11
Native To
Mexico
Toxicity
Toxic to pets if ingested
Planting
How to Grow
- Select a sunny location with well-draining soil.
- Tuck tubers 4-6 inches deep in spring after the last frost.
- Water regularly to keep soil moist but not soggy.
- Fertilize monthly with a balanced flower fertilizer during the growing season.
- Stake tall varieties to support heavy blooms.
- Deadhead spent flowers to encourage continuous blooming.
Pro Tip
Mulch around plants to retain moisture and suppress weeds for lush blooms.
Keep It Thriving
Care Guide
Do
- Water deeply once a week during dry spells 🌱
- Apply a balanced fertilizer monthly during the growing season
- Stake tall varieties to prevent toppling
Don't
- Avoid overwatering to prevent tuber rot ❌
- Don’t disturb dormant tubers in late fall
- Refrain from fertilizing late in the season to avoid weak, floppy stems
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Fertilize | ||||||||||||
| Lift Store | ||||||||||||
| 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
Garden Dahlia questions
What zones can Garden Dahlia grow in?
Garden 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 Garden Dahlia deer resistant?
Not reliably. Deer may browse Garden Dahlia, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Garden Dahlia bloom?
Garden Dahlia typically blooms in mid-summer to fall through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Garden Dahlia need full sun?
Garden 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 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 Garden 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.