Parthenium integrifolium

RHS Plant Profile
American feverfew

Other common names

cutting almond, prairie dock, wild quinine

Herbaceous Perennial

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

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
1-1.5 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Well–drained or Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness
H7
Drought Resistance
Yes

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Semi evergreen
Habit
Clump forming
Genus
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