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Aspen (Quaking)


Height and Spread Quaking Aspens can grow anywhere from 7.6 metres to 19.8 metres or more in height and may have a crown width of 6 to 9 metres.

Hardiness Zone 1

Preferred growing conditions Quaking Aspens grow best in north and east facing slopes that receive full sun and have moist soils. They do not tolerate shade and do poorly in drought conditions.

Form Quaking Aspens are tall, narrow trees whose trunks have very little taper at its tip.

Flower/seeds Catkins are green when immature and turn brown as it expands to produce very small cottony seeds that float in the wind.

Leaf Oval serrated leaves have dark green tops and dull green undersides that tremble in the slightest breeze (reason why this tree is also known as a Trembling Aspen)

Bark/wood Bark may be white to olive-grey. As the tree matures, furrows appear on the lower trunk creating a rough texture.

Fruit Not applicable

Pruning Prune to keep shape and remove damaged limbs. Sterilize pruning saws and shears with methanol (gasline anti-freeze) between cuts and between trees.

Problems (Disease/Insects)

Canker (hypoxylon or cystopora) and stem decay