Populus tremula
Aspen
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Aspen (Populus tremula) - Description
Populus tremula, commonly called aspen, common aspen, Eurasian aspen, European aspen, or quaking aspen, is a species of poplar native to cool temperate regions of Europe and Asia, from Iceland and the British Isles east to Kamchatka, north to inside the Arctic Circle in Scandinavia and northern Russia, and south to central Spain, Turkey, the Tian Shan, North Korea, and northern Japan.
Aspen (Populus tremula) - Blooming
Male and female catkins on separate trees borne in late winter or spring before the leaves.
Aspen (Populus tremula) - Growth
Fast-growing deciduous trees, native to northern temperate zone. White or gray park, and leaves that flutter gracefully in the wind. Invasive root systems, so avoid growing within 100' of a building. Populus does best in full sun. P. alba and P. x canescens flourish in coastal regions. Populus works best as a windbreak.
Aspen (Populus tremula) - Planting
Propagate from hardwood cuttings in winter. Can also propagate from suckers in fall or late winter.
Aspen (Populus tremula) - Pest
Leaf miners, borers, scale insects, caterpillars, and leaf hoppers. Populus is also prone to canker, butt rot, powdery mildew, root rot, dieback, leaf blister, white rot, rust, and crown gall.
Aspen (Populus tremula) - Interesting facts
The name Cottonwood comes from the fluffy white seeds produced by the female catkins. (Catkins are the specific term for a type of inflorescence of flowers that is found in the Populus genus. The leaf buds and unfolding leaves are often aromatic. Some of the most massive living things on earth are colonies of poplar that spread through root suckers, one in Utah is nick-named "Pando" and is an estimated at well over 6,000 tons.
Aspen (Populus tremula) - Soil and irrigation
Moist, but well-drained soils that are deep and rich. Does not tolerate over-watering. P. alba and P. x canescens can withstand dry conditions.
