Ceanothus hearstiorum
Ceanothus hearstiorum
UC Botanical Garden at Berkeley

Ceanothus hearstiorum

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Common name:  Hearst Ranch Buckbrush and Hearst's Ceanothus

Special notes: This Ceanothus is endemic to California, growing wild only on the hilly coastline of San Luis Obispo County. A mostly prostrate shrub, it generally stays less than 1’ high and spreads to 3-5’, with a star-shaped branching pattern. The evergreen leaves are distinctive: toothed, and adorned with ripples, hairs and knobs. Spring flower clusters are borne on short, stout stalks; the flowers are blue with prominent yellow-anthered blue stamens. It prefers somewhat cool summer temperatures with some fog. If planted inland, give afternoon shade and occasional water in the summer. Although rare in the wild, it is a popular garden and habitat plant, and is host to up to 30 different butterflies and moths.
Family: Rhamnaceae
Native to: California, growing wild only on the hilly coastline of San Luis Obispo County
Form: Mostly prostrate shrub with a star-shaped branching pattern; evergreen leaves are distinctive: toothed, and adorned with ripples, hairs and knobs
Size: 1’ high and spreads to 3-5’
Blooms: Spring
Attracts: Host to up to 30 different butterflies and moths.
Flowers: Flower clusters are borne on short, stout stalks; the flowers are blue with prominent yellow-anthered blue stamens
Light: Prefers somewhat cool summer temperatures with some fog; if planted inland, give afternoon shade and occasional water in the summer
Water: Occasional water in the summer
Hardiness: To 15 degrees F
Soil:  Tolerates alkaline soil and clay