Rudbeckia triloba 'Blackjack Gold'
A bushy biennial or short-lived perennial to 1m tall, with dark red stems and roughly hairy leaves. From late summer into early autumn it bears a profusion of flowerheads to 5cm across, composed of golden yellow ray florets around a raised, black cones. This cultivar shows good disease-resistance, and its pollinator-friendly flowers are good for cutting
Size
Ultimate height
0.5–1 metresTime to ultimate height
1–2 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Yellow | Green | ||
| Autumn | Yellow | Green | ||
| Winter |
Position
- Full sun
Aspect
East–facing or South–facing or West–facing
Exposure
Exposed or Sheltered Hardiness
H6Botanical details
- Family
- Asteraceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Bushy
- Genus
Rudbeckia may be annuals, biennials or rhizomatous herbaceous perennials, with simple or pinnately divided leaves and large daisy-like flower-heads with yellow or orange rays surrounding a prominent conical disk
- Name status
Unresolved
How to grow
Cultivation
Grow in moderately fertile soil that does not dry out. Will tolerate light shade but flowering is best in full sun. See rudbeckia cultivation
Propagation
Propagate by seed or division
Suggested planting locations and garden types
- Cottage and informal garden
- Prairie planting
- Wildlife gardens
- Low Maintenance
- Cut flowers
- Flower borders and beds
Pruning
Cut old stems back to ground level in early spring
Pests
May be susceptible to aphids
Diseases
Generally disease-free
Get involved
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