Rudbeckia subtomentosa
sweet coneflower
An upright, herbaceous perennial to 1.5m, with branching stems and lobed leaves. From late summer to autumn it produces daisy-like flowerheads composed of bright yellow ray florets around a central, dark brown cone. The pollinator-friendly flowers are good for cutting
Size
Ultimate height
1–1.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.5–1 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
Sheltered Hardiness
H5Botanical details
- Family
- Asteraceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Clump forming
- 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
Correct
- Plant range
- C USA
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
May be susceptible to Powdery mildews
Get involved
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