Salix arbuscula

RHS Plant Profile

mountain willow

Synonyms

Salix formosa
Salix prunifolia

Shrubs

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A dwarf deciduous shrub, with a spreading habit and small, bright glossy green leaves that turn yellow in autumn. Female plants produce yellow catkins with the foliage in May or June; catkins on male plants are smaller and brown with red anthers

Position

Full sun

Soil Types

Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 5–10 years
Max Spread: 0.1-0.5 metres
Max Height: 0.1-0.5 metres

Growing Conditions

Clay Loam Sand

Moisture: Moist but well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: East–facing or South–facing or West–facing
Exposure: Exposed or 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: Salicaceae
Native to GB/Ireland: Yes
Foliage: Deciduous
Habit: Matforming
Genus: Salix are deciduous shrubs and trees of diverse habit, with simple leaves and tiny flowers in catkins, male and female usually on separate plants. Some are valued for their brightly coloured winter shoots, others for their foliage or showy male catkins
Name Status: Correct
Plant Range: Europe to C Asia

How to Grow

Cultivation

Grow in any moist but well-drained soil in full sun. Tolerates poor soils but avoid shallow chalk

Propagation

Propagate by softwood cuttings in early summer or hardwood cuttings in winter

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Cottage and informal garden
Patio and container plants
Rock garden
Wildlife gardens
Ground cover

Pruning

Pruning group 1

Pests

May be susceptible to aphids, caterpillars, willow leaf beetle, sawflies and willow scale insects

Diseases

May be susceptible to willow anthracnose, honey fungus and rust diseases