Ceanothus cuneatus
An evergreen, drought-tolerant, nitrogen-fixing shrub native to Oregon, California, and northern Baja California and to California chaparral, that rapidly recolonizes after fire, often forms dense thickets on rocky sites, bears fragrant white to lavender flower clusters, has explosive fruit capsules that disperse seeds after fire and serve as a larval host for several butterfly and moth species, and provides food, cover, and pollinator habitat for wildlife.
Common Names
Buckbrush, Wedgeleaf Ceanothus, Buckbrush Ceanothus, Cuneate Ceanothus, Blue Brush, Narrowleaf Buckbrush
Summary
Buckbrush is an evergreen shrub native to Oregon, California, and northern Baja California, forming a spreading to rounded plant with stiff angular branches and bluish-green, leathery leaves with slight teeth. It bears abundant fragrant white flowers in dense clusters on current-season growth, sometimes tinted blue or lavender, followed by horned seed capsules that eject three seeds when mature; nitrogen-fixing ability makes it a soil enricher and it provides dense wildlife cover and nectar for pollinators.
Prefers full sun and dry, well-drained soils, including sandy, loamy, and rocky substrates, and tolerates serpentine and other poor soils. Drought-tolerant with minimal irrigation once established; deer resistant; widely used for erosion control, hedgerows, mass plantings, and naturalized landscapes; provides nectar to bees and butterflies and serves as wildlife habitat. Propagation mainly by seed after scarification and stratification, or by semi-hard cuttings in summer or root cuttings in late fall to early winter; seeds dispersed explosively from capsules up to 35 ft; post-fire germination after heat; fire intervals of 30 to 100 years recommended to maintain seed bank and stand structure.
Lifecycle
Perennial
Height
3-12 feet
Spread
5-12 feet
Hardiness Zones
Zones 8-11
Sunlight Requirements
Ideally full sun to partial sun.
Soil Type
Well-drained soil; suitable in light sandy or medium loamy soils, and tolerates sand, clay, and serpentine.
Soil Drainage
Well-drained soil
Soil pH
Tolerates all pH levels
Bloom Color
White; sometimes tinted blue or lavender.
Bloom Time
Spring to early summer
Foliage Color
Green
Fall Foliage Color
Green
Leaf Lifecycle
Evergreen broadleaf
Growth Rate
Fast-growing
Seasons of Interest
Spring, Summer, Fall, Winter
Propagation Methods
Seeds, Semi-hardwood cuttings, Root cuttings, Layering
Attracts Wildlife
Attracts bees, butterflies, hummingbirds, other pollinators, birds
Taxonomy
- Taxonomic Rank
- Species
- Author
- (Hook.) Nutt.
- Publication
- Fl. N. Amer. 1: 267 (1838)
Superior Taxa
- Kingdom
- Plantae
- Subkingdom
- Pteridobiotina
- Phylum
- Angiosperms
- Order
- Rosales
- Family
- Rhamnaceae
- Genus
- Ceanothus
Inferior Taxa
Ceanothus cuneatus subsp. fascicularis Ceanothus cuneatus subsp. rigidus Ceanothus cuneatus subsp. sonomensis Ceanothus cuneatus var. dubius Ceanothus cuneatus var. ramulosus
Synonyms
Nestronia cuneata Ceanothus cuneatus var. cinerascens Ceanothus cuneatus var. rufescens Ceanothus submontanus Ceanothus cuneatus var. cuneatus Rhamnus cuneatus Ceanothus cuneatus var. submontanus