How to grow western columbine

When to plant western columbine

A long-lived perennial that thrives in dappled shade but tolerates full sun to shade, blooming from late spring into July. Easy from seed but needs a long cold-moist stratification (10 to 12 weeks), so sow outdoors in fall or start indoors after chilling; it also divides easily.

Western Columbine is timed by season rather than your frost dates, so the planting calendar does not generate ZIP-specific dates for it. Check the cited sources below to fine-tune for your area.