Black-eyed Susan
Rudbeckia triloba 'Blackjack Gold'
Essentials
At a Glance
Plant Type
Perennial
Height
24 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8
Water
Dry to medium
Humidity
Average
Lifespan
Short-lived perennial or biennial
Native To
Eastern North America
Toxicity
Non-toxic
The Story
Plant Bio
Rudbeckia triloba 'Blackjack Gold' is a perennial shrub with bushy, rounded growth, featuring deeply lobed green leaves and abundant daisy-like flowers with golden-yellow petals and dark central discs. This cultivar is distinguished by its vibrant golden-yellow flowers that bloom profusely from summer to autumn, providing long-lasting colour and attracting pollinators to the garden.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into well-drained soil in early spring.
- Water thoroughly after planting to establish roots.
- Place in full sun for optimal flowering.
- Thin seedlings to avoid overcrowding, after 6 weeks.
- Fertilize lightly in spring with a balanced fertilizer.
- Divide clumps every 3-4 years in early spring or fall.
Pro Tip
Ensure well-drained soil and full sun for best blooms.
Keep It Thriving
Care Guide
Do
- Water regularly during dry spells 🌱
- Deadhead spent flowers to encourage more blooms
- Divide plants every few years to maintain vigor
Don't
- Avoid overwatering which can cause root rot ❌
- Don't fertilize excessively, as it can lead to floppy stems
- Refrain from heavy pruning in late fall
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Mulch | ||||||||||||
| Plant | ||||||||||||
| Spring Cleanup |
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
Black-eyed Susan questions
What zones can Black-eyed Susan grow in?
Black-eyed Susan 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 Black-eyed Susan deer resistant?
Not reliably. Deer may browse Black-eyed Susan, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Black-eyed Susan bloom?
Black-eyed Susan 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 Black-eyed Susan need full sun?
Black-eyed Susan does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Black-eyed Susan drought tolerant?
Yes — once established (usually after the first full season), Black-eyed Susan handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
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Grow Black-eyed Susan 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.
