Overview
Ceanothus spinosus is a bushy, spreading branched shrubs in the genus Ceanothus, part of the Rhamnaceae family, with evergreen foliage. Ceanothus spinosus grows best in full sun, and tolerates loam and sand soils and any pH. Its UK hardiness is rated H4. Suggested uses include city and courtyard gardens, coastal, cottage and informal garden, wildlife gardens, wall side borders and flower borders and beds.
About
Ceanothus spinosus, with the common names greenbark and redheart, is a species of Ceanothus. It is native to southern California and northern Baja California, where it grows in the scrub and chaparral of the coastal mountain ranges. In the garden it prefers full sun and loam and sand soil. In UK gardens it is hardy through an average UK winter (RHS H4). Suggested uses include city and courtyard gardens, coastal, cottage and informal garden, wildlife gardens, wall side borders and flower borders and beds. It tolerates soil of any pH, well-drained conditions and south-facing and west-facing aspects. Plant in well-drained soil in sun or partial shade.
Wikipedia contributors, CC BY-SA 4.0 — Ceanothus spinosus
About the genus
Ceanothus is a genus of about 50–60 species of nitrogen-fixing shrubs and small trees in the buckthorn family (Rhamnaceae). Common names for members of this genus are buckbrush, California lilac, soap bush, or just ceanothus. The genus is native to North America, ranging from Canada and the United States south through Mexico to Panama, with the center of diversity in the California floristic province of the western United States and Mexico, where around ~42 species are endemic out of the roughly ~58 species in the genus.
Wikipedia contributors, "Ceanothus", CC BY-SA 4.0 — Ceanothus
Growing conditions
Best soil and position for Ceanothus
- Sunlight
- Full sun
- Soil type
- Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Well-drained
- Aspect
- South-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H4
Plant details
Ceanothus spinosus size, habit and characteristics
- Plant type
- Shrubs
- Habit
- Bushy, Spreading branched
- Foliage
- Evergreen
- Suggested uses
- City and courtyard gardens, Coastal, Cottage and informal garden, Wildlife gardens, Wall side borders, Flower borders and beds
Care notes
Pruning and caring for Ceanothus spinosus
- Propagation
- Semi-hardwood cuttings in mid to late summer
- Pest resistance
- Scale insects
- Disease resistance
- Honey fungus
Frequently asked questions
Where is the best place to plant Ceanothus spinosus?
Ceanothus spinosus prefers full sun. It suits sheltered positions.
What soil does Ceanothus spinosus need?
Ceanothus spinosus grows best in loam and sand soil. It is happy in soil of any pH. Aim for soil that stays well-drained.
Is Ceanothus spinosus hardy in the UK?
Ceanothus spinosus has an RHS hardiness rating of H4, meaning it is hardy through an average UK winter, tolerating -10 to -5°C.
How do I propagate Ceanothus spinosus?
Semi-hardwood cuttings in mid to late summer.
More in the Ceanothus genus
- Ceanothus 'Madagascar'California Lilac
- Ceanothus x pallidus 'La Géant'
- Ceanothus 'Eleanor Taylor'Californian lilac 'Eleanor Taylor'