Skip to content
← Plant Database
California Lilac

California Lilac

Ceanothus thyrsiflorus

shrub☀️ full sun💧 low waterZone 5aZone 10b

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

Tolerances & Soil

Zone 5aZone 10b
1471013
ColderWarmer
Zone range: Zone 5a to Zone 10b

Seasonality

Bloom Season

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

Season of Interest

SpringSummer

Shrub

Woody multi-stem plants at eye level.

Succession Role

pioneerearly successional

Native to the United States

Native Range

Coastal California

Native to: California

Function & Care

erosion controlhedgerownitrogen fixerpollinator nectarywildlife benefit

Establishment & Care

Establishment
easy
Maintenance
low
Propagation
seed, cutting

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.