![]() In the Pacific Northwest, bigleaf maple thrives in moist gravels. On the Gulf Islands of British Columbia, bigleaf maple grows on alluvial floodplains, outwash sandy loams, eroded rocky shores, shallow to deep glacial tills, poorly drained marine clays, and wet organic soils. Soils supporting bigleaf maple are commonly coarse or gravelly in texture, although it also grows in fine-textured soils. īigleaf maple often grows in alluvial soils, but it is occasionally found on dry upland soils. The site has hot, dry summers, late spring frosts, and is a notoriously difficult site on which to regenerate commercial conifer species. ![]() It is a minor species, for example, on the Dead Indian Plateau of southwestern Oregon. It is occasionally reported on dry sites. Bigleaf maple is confined to riparian zones, moist canyons, and other sites with permanent water in central and southern California. Franklin and Dyrness consider bigleaf maple characteristic of old land surfaces-particularly upper riparian terraces-of the Olympic rain forest. In riparian habitats, it is often found on upper terraces of 5th- and 6th-order streams, although it also grows near smaller streams. Bigleaf maple is most common in upland riparian zones but also grows in low riparian zones and in mesic upland forests of the Pacific Northwest. In the Siskiyou Mountains of southern Oregon and northern California, bigleaf maple frequency increased with increasing soil moisture. Its frost tolerance is low, and it does not grow where deep soil freezes occur before snowfall (, review by ).īigleaf maple prefers moist to mesic habitats and is described as "moisture demanding". Bigleaf maple is apparently limited by cold climate to the north of its distribution and by drought to the south. Moist woods, forests, and canyons are bigleaf maple's most common habitats throughout much of its distribution. States and provinces (as of 2011 ):Ĭanada: BC SITE CHARACTERISTICS AND PLANT COMMUNITIES: Isolated bigleaf maple populations may occur in Idaho. Some authors place bigleaf maple's distribution as far north as the Alaska panhandle. It is widespread in the Coast Ranges, the Klamath-Siskiyou Mountains, and the foothills of the Cascade Range and the northern Sierra Nevada, obtaining best development in southern Oregon.
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