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Ailanthus altissima

More About Ailanthus altissima

  • Upright, variable, spreading, growth habit
  • Yellow-green flowers are hidden by the foliage
  • Compound, pinnate leaves emerge bronze, turning dark green
  • Seeds (twisted samaras) are borne in clusters, persisting into the winter
  • Use only where nothing else will grow
  • Bloom Time: Spring

Interesting Notes:

Invasive in Ontario and much of the USA, having been introduced from Asia in 1748.

Ailanthus are dioecious: there are male or female plants, rarely male AND female. The leaves, stems and especially the male flowers have an offensive odour. They are also allelopathic: producing herbicides that limit the growth of other plants around them.

Zone:

4

Height:

18-20 m

Spread:

16-18 m

Colour:

Lime-green
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Tree of Heaven Growing and Maintenance Tips

Ailanthus will tolerate heavy urban pollution and adverse conditions, including dry, rocky soils with ranges of pH.


Ailanthus altissima Characteristics

Full Sun
Full Sun
Partial Sun/Shade
Partial Sun/Shade
Fast
Fast
Drought Tolerant
Drought Tolerant
Heat Tolerant
Heat Tolerant

Soil Moisture

Average to Dry Soils

Attributes

Fruit
Deciduous
Seed

Flowering Time

Spring

Habit

Spreading
Upright
Tree form
Rounded

Foliage Color

Green