Bigleaf maple

Acer macrophyllum 路 Sapindaceae 路 also Oregon maple

The largest maple in North America, with the biggest leaves of any maple (up to a foot across) that emerge burgundy, mature glossy green and turn yellow-orange in fall. Hanging chains of yellow-green flowers in spring become winged seeds. In wet coastal forests its limbs are draped in moss and licorice fern. It is a grand shade tree for large lots and parks but its shallow roots crack sidewalks and its leaf fall is heavy.

Broadleaf, drops leavesFast growingSun or part shadeModerate water
Bigleaf maple
Angilbas at English Wikipedia, Public domain, via Wikimedia Commons

Where it stands

Native

  • 馃嚚馃嚘 BC, Canada 路 Southwestern British Columbia.source
  • 馃嚭馃嚫 AK, United States 路 Southernmost coastal Alaska.source
  • 馃嚭馃嚫 CA, United States 路 Coast and Sierra Nevada foothills.source
  • 馃嚭馃嚫 ID, United States 路 Small disjunct population.source
  • 馃嚭馃嚫 OR, United Statessource
  • 馃嚭馃嚫 WA, United Statessource

Care

Plant in sun or part shade in moist, well-drained soil and water through dry summers for the first few years. Prune in summer or when fully dormant, not in spring when sap flows. It has few serious pests; older trees develop heart rot, and verticillium wilt and aphids occur. Give it room away from pavement.

Benefits

ShadeFast canopyFall colorWildlifeBirdsPollinatorsEdible

Good for

Yard shadeparksStreambanksTimberReforestation

Watch out for

Surface rootsHeavy litterLarge roots