Hairy Manzanita
Arctostaphylos columbiana
Ericaceae · broadleaf · native
You spot Hairy Manzanita on open, rocky coastal slopes from British Columbia to central California, where its distinctive hairy twigs and evergreen foliage persist year-round. This native shrub dominates exposed ridgelines and coastal bluffs in the maritime Pacific Northwest.
Hairy Manzanita grows 3-10 feet tall and demands full sun to part shade with low water needs and well-drained soil (zones 7a-8b). Slow growth and moderate lifespan suit it to rocky, infertile sites where few competitors thrive. Provide minimal supplemental water once established. Watch for black root rot, leaf gall, and phytophthora dieback in wet settings; manzanita leafgall aphids may cause cosmetic galls.
Quick Facts
Phenological Calendar
| Stage | Typical Window |
|---|---|
| New growth flush BBCH 11 | Feb 15-Mar 15 |
| Bloom start BBCH 61 | Mar 1-Mar 31 |
| Bloom end / petal fall BBCH 69 | Apr 1-Apr 15 |
| Fruit/seed development BBCH 71 | Jun 1-Aug 31 |
| Fruit/seed maturity BBCH 85 | Sep 1-Nov 30 |