Cool temperate and cool mesothermal climates from southern British Columbia south through Washington and Oregon to California and east to western Montana. Found from sea level to 2100 m, decreasing in occurrence with increasing elevation, latitude and precipitation (Pojar and MacKinnon, 1994).
Well-drained, coarse-textured soils (Pojar and MacKinnon, 1994).
Nitrogen-medium soils (Pojar and MacKinnon, 1994).
pH 5.5 to 7.5
Very dry to moderately dry, moisture-shedding sites soils (Pojar and MacKinnon, 1994).
Full sun to partial shade. Prefers open areas (open woodlands, clearings, logged areas, ravine edges, coastal bluffs) (Pojar and MacKinnon, 1994).
Climax species on drier sites. Pioneer seral species on moister sites due to its ability to regenerate after fire and other disturbances (Stickney, 1974; Anderson, 1987).
Characteristic of the Garry oak-oceanspray community where it is most often associated with indicator plants such as Oregon grape (Mahonia spp.) and the moss Kindbergia oregana (Klinka et al., 1989; Erickson, 1996).