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Trees

Populus tremula

aspen

A large deciduous tree with a broad crown, sometimes suckering freely. Rounded leaves, bronze when young, tremble in a light breeze and turn yellow in autumn. Male trees have woolly grey catkins

Other common names

aps
asp
see morehaps tree
quaking aspen
trembling tree

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Ultimate height

Higher than 12 metres

Time to ultimate height

20–50 years

Ultimate spread

Wider than 8 metres

Chalk

Clay

Loam

Sand

Moisture

Moist but well–drained, Poorly–drained, Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–facing or North–facing or East–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)

Botanical details

Family: Salicaceae
Native to GB / Ireland: Yes
Foliage: Deciduous
Habit: Spreading branched
Genus: Populus are deciduous trees, mostly very fast-growing and large, with male and female catkins on separate trees, opening before the leaves. Male catkins are the more ornamental, female ones can be a nuisance from the cottony, wind-blown seeds
Name status: Correct
Plant range: Europe, N Africa, SW Asia

How to grow

Cultivation

Grow in moist but well-drained, humus-rich, fertile soils but avoid planting in vicinity of buildings due to vigorous root system; it has the potential to become a nuisance. Very useful as a screen or as part of a shelter belt and grows very rapidly

Propagation

Propagate from hardwood cuttings in winter or suckers in autumn or late winter

Suggested planting locations and garden types

Wildlife gardens
Low Maintenance
Hedging and screens

Pruning

Pruning group 1; sucker removal in autumn or winter if necessary

Pests

May be susceptible to leaf beetles, sawflies and caterpillars

Diseases

May be susceptible to leaf spots, poplar bacterial canker, tree rusts and honey fungus

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