Populus tremuloides (Quaking Aspen (Native))

Quaking Aspen (Populus tremuloides) is the most widely distributed tree in North America and one of the great keystone species of the continent. Glossy round leaves on flattened petioles tremble in the slightest breeze. The sound alone is iconic. Smooth pale greenish-white to cream bark (often with dark horizontal scars) frames a slender pyramidal crown that matures to a narrow rounded shape at 30 to 60 feet. Fall color is pure luminous gold.

Quaking aspen reproduces primarily through clonal root sprouting. A single aspen grove is often one genetic individual connected belowground. The Pando clone in Utah's Fishlake National Forest covers 106 acres, weighs an estimated 6,000 tonnes, and is believed to be among the oldest and heaviest living organisms on Earth (USFS).

Ecologically, aspen is a wildlife keystone. FEIS documents use by elk, mule and white-tailed deer, moose, beaver (preferred food), ruffed grouse (buds are a winter staple), sharp-tailed grouse, red-naped sapsuckers drilling sap-wells, cavity-nesting birds, and dozens of songbirds. Douglas Tallamy's research puts Populus among the top Lepidoptera-supporting tree genera in North America. Host to nearly 400 species of moths and butterflies including tiger swallowtails, mourning cloaks, viceroys, and a legion of silkmoths.

NAEB documents 92 Indigenous uses across dozens of Nations including Abnaki, Apache, Mescalero, Bella Coola, Blackfoot, Carrier, Southern, Cheyenne, Chippewa, Cree, Woodlands, Crow, Delaware, Ontario, Flathead, Gitksan, Haisla, Haisla and Hanaksiala, Hopi, Iroquois, Isleta, Klamath, Meskwaki, Micmac.... The inner bark, buds, catkins, leaves, and wood have been used as food, medicine (analgesic, gastrointestinal aid, cold remedy, dermatological aid), cordage and building material, fodder, ceremonial incense, and fuel. Aspen bark contains salicin (same family of compounds as aspirin) and has a long medicinal record across the continent.

Heavily browsed by deer, elk, and moose. not deer-resistant. Protect young plantings. Full sun, moist to average soil, cool climate. Hardy Zone 1 to 7. Does not tolerate heat, humidity, or coastal salt wind. A mountain/interior tree, not a coastal one. Fast-growing but relatively short-lived; renews by root suckering. Plant where a colony is welcome.

Pairs with Pseudotsuga menziesii, Abies concolor, Amelanchier alnifolia, and Ribes in montane or foothill settings.