Dry, open, sparsely treed sites, rocky slopes and grassy bluffs at low to middle elevations (Pojar and MacKinnon, 1994).
Coarse free-draining soils (Klinka et al., 1995).
Nitrogen-rich soils (Klinka et al., 1995).
Neutral to mildly alkaline.
Dry to moderately dry (Klinka et al., 1995).
Full sun to light shade (Pojar and MacKinnon, 1994).
Edaphic climax on dry water-shedding sites.
Scattered to common on bluffs and rock outcrops within Garry oak ecosystems.
