California Lilac 'Ray Hartman

Ceanothus 'Ray Hartman

Rhamnaceae · broadleaf evergreen shrub · cultivar

Last updated May 20, 2026

Quick Facts

Height

15-20 ft

Spread

15-20 ft

Growth Rate

Fast

Light

Full Sun

Soil

Well Drained

Water

Low

Hardiness

Zones 8–10

Origin

Hybrid cultivar (C. arboreus × C. griseus)

Field Observation

Ceanothus ‘Ray Hartman’ · California Lilac

full bloom

May 17, 2026 · Bellevue · 2,201 GDD₃₂ · BBCH 65

Stage	Typical Window	What to Look For
Full bloom BBCH 65	May	Dense clusters of blue flowers covering the plant

Data Maturity

Baseline Extension data. Expert review underway.