Picrasma quassioides

RHS Plant Profile
quassia

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quassia RHS 1999

Synonyms

Picrasma ailanthoides

Trees
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A slender deciduous tree to 8m tall, with pinnate leaves to 40cm long, colouring well in autumn, and sprays of tiny green flowers in early summer, followed by red berries

Position

Full sun, Partial shade

Soil Types

Loam

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

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

Position

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

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Simaroubaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Picrasma are deciduous trees with rather large, pinnate leaves composed of several pairs of ovate leaflets, with loose clusters of tiny flowers in the leaf axils, followed by small berries
Name Status
Correct
Plant Range
Temperate Asia

How to Grow

Cultivation

Grow in fertile, well-drained soil in full sun or partial shade. Shelter from cold drying winds

Propagation

Propagate by seed sown in containers in a cold frame in autumn

Suggested planting locations and garden types

  • Cottage and informal garden
  • City and courtyard gardens
  • Flower borders and beds

Pruning

Pruning group 1

Pests

Generally pest-free

Diseases

Generally disease-free