Ptelea trifoliata

RHS Plant Profile
hop tree
hop tree RHS

Other common names

shrubby trefoil, stinking ash, swamp devil's bit, wafer ash, water ash, wing seed, swamp dogwood

Plants for pollinators
Shrubs

A large, deciduous shrub with dark green, tripartite leaves to 12cm long. Sprays of star-shaped, pale green flowers appear in summer, followed by bunches of flattened, winged seeds up to 2.5cm across. Leaves, flowers and bark are all aromatic

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

4-8 metres

Max Spread

2.5-4 metres

Size

Time to Maturity
20–50 years
Max Spread
2.5-4 metres
Max Height
4-8 metres

Growing Conditions

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

Position

Full sun Partial shade
Aspect
South–facing or West–facing or East–facing
Exposure
Exposed or Sheltered
Hardiness
H6

Colour & Scent

Fragrance Bark Flower Foliage
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Rutaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Ptelea are large, spreading deciduous shrubs with pungently scented, 3-foliate leaves and small yellow-green flowers in summer followed by attractive winged fruits
Name Status
Correct
Plant Range
USA

How to Grow

Cultivation

Grow in fertile well-drained soil in full or dappled sun. Suitable for shrub border or as a lawn specimen

Propagation

Propagate by seed or semi-hardwood cuttings

Suggested planting locations and garden types

  • Cottage and informal garden
  • Wildlife gardens
  • Low Maintenance
  • Flower borders and beds

Pruning

Pruning group 1

Pests

Generally pest-free

Diseases

May be susceptible to honey fungus in gardens where it is present but insufficient data to determine degree of susceptibility