The Story
Plant Bio
Rudbeckia deamii, commonly known as Deam's Coneflower, is a hardy perennial with upright clumps of dark green, lance-shaped leaves and bright yellow daisy-like flowers featuring prominent central cones.
This species is valued for its long-lasting summer blooms and excellent resistance to drought and heat, making it ideal for low-maintenance perennial borders and wildlife gardens.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Perennial
Height
30 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8
Water
Moderate, drought tolerant once established
Humidity
Prefers moderate humidity
Lifespan
Perennial
Native To
Central United States
Toxicity
Non-toxic
Bloom period
Mid-summer – Late summer
In flower about 2 months of the year
Planting
How to Grow
- Tuck seeds into prepared soil in early spring.
- Water regularly until seedlings establish.
- Thin seedlings to proper spacing after germination.
- Mulch around plants to retain moisture and suppress weeds.
- Fertilize lightly in spring with a balanced fertilizer.
- Deadhead spent flowers to promote continuous blooming.
Pro Tip
Plant in well-drained soil in full sun for best flowering.
Keep It Thriving
Care Guide
Do
- Water deeply during dry spells 🌱
- Prune back in late fall after flowering
- Fertilize annually with compost or balanced fertilizer
Don't
- Avoid overwatering to prevent root rot ❌
- Do not disturb roots during the growing season
- Skip heavy fertilization that can promote foliage over flowers
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Mulch | ||||||||||||
| Plant | ||||||||||||
| Spring Cleanup |
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
Deam's Coneflower questions
What zones can Deam's Coneflower grow in?
Deam's Coneflower is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Deam's Coneflower deer resistant?
Yes — Deam's Coneflower is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Deam's Coneflower bloom?
Deam's Coneflower 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 Deam's Coneflower need full sun?
Deam's Coneflower does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Deam's Coneflower drought tolerant?
Yes — once established (usually after the first full season), Deam's Coneflower handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Rudbeckia to compare
American Gold Rush Black-eyed Susan
Rudbeckia hirta 'American Gold Rush'
Autumn Colors Mix Black-eyed Susan
Rudbeckia hirta 'Autumn Colors Mix'
Goldsturm Black-eyed Susan
Rudbeckia fulgida 'Goldsturm'
Cherokee Sunset Black-eyed Susan
Rudbeckia hirta 'Cherokee Sunset'
Chim Chiminee Black-eyed Susan
Rudbeckia hirta 'Chim Chiminee'
Black-eyed Susan
Rudbeckia hirta
Keep exploring
Explore the genus
Hardy in your zone?
Grow Deam's Coneflower 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.