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Plant Database
California Lilac

California Lilac

Ceanothus thyrsiflorus

shrub☀️ full sun💧 low water Hardy: Zone 5aZone 10b

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A native California shrub prized for its vibrant blue flower clusters and evergreen foliage, thriving in drought conditions once established. Excellent for dry gardens, pollinator support, and low-water permaculture landscapes.

Overview

Form
Rounded
Growth Rate
moderate
Size
4–8′ tall × 4–8′ wide
Dormancy
evergreen
Family
Rhamnaceae

Native to the United States

Native Range

Coastal California

Native to: California

Seasonality

Bloom Season

J
F
M
A
M
J
J
A
S
O
N
D

Season of Interest

SpringSummer

Notable Cultivars

Skylark is a compact cultivar ideal for smaller spaces; Concha produces deep, rich blue flower clusters; Anchor Bay is a low-spreading groundcover type suitable for slope stabilization and erosion control.

Companion Planting

Plants well with