Parthenium integrifolium
American feverfew
A clump-forming perennial to 1.2m high, with a basal rosette of large, oval-shaped coarsely toothed green leaves. Small, domed, densely packed heads heads of faintly scented, tiny white flowers are borne on stout, branching stalks from late spring into summer
Size
Ultimate height
1–1.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Well–drained, Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | White | Green | ||
|---|---|---|---|---|
| Summer | White | Green | ||
| Autumn | Green | |||
| Winter | Green |
Position
- Full sun
- Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
Exposed or ShelteredDrought resistance
Yes Hardiness
H7Botanical details
- Family
- Asteraceae
- Native to the UK
- No
- Foliage
- Semi evergreen
- Habit
- Clump forming
- Name status
Correct
- Plant range
- Central and E USA
How to grow
Cultivation
Tolerates a range of soils and conditions, but thrives in full sun. A good cut or dried flower
Propagation
Propagate by seed, sown in a cold frame in autumn, or by softwood cuttings in early summer
Suggested planting locations and garden types
- Cottage and informal garden
- Prairie planting
- Wildflower meadow
- Cut flowers
- Flower borders and beds
Pruning
Deadhead after flowering if seed is not required, or seedheads can be left to provide winter structure
Pests
Generally pest-free
Diseases
Generally disease-free
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