From Oregon Flora, Gardening with Natives:
Larkspur has jewel-like spires of spurred flowers ranging in color from cobalt to indigo. This coastal perennial likes wet feet and tolerates flooding, so it will shine in a shady water garden or moist woodland planting with high organic matter. Poisonous if ingested, larkspur is especially dangerous for cattle and other livestock; however, its luminous flowers are loved by hummingbirds, songbirds, and butterflies. An early- to mid-summer bloomer, this vivid wildflower will liven up any planting.
- Willamette Valley