Dry to vernally moist grassy meadows and rocky slopes at low elevations south of 55º N (Pojar and MacKinnon, 1994).
Organic soils to coarse-textured, well-drained rocky soils (Douglas et al., 1998).
Nitrogen-poor soils (Klinka et al., 1989).
Dry to seasonally moist (Douglas et al., 1998). Prefers lower rainfall areas (Clark, 1976).
Shade intolerant to mildly shade tolerant.