Ceanothus thyrsiflorus var. repens

Creeping blue blossom, California lilac

Ceanothus thyrsiflorus var. repens is a low-growing, evergreen shrub with a spreading habit and masses of pale blue flowers in spring. Reaching 50-100cm tall and 250-400cm wide, it forms dense ground cover, ideal for slopes and borders.

Its glossy green foliage provides year-round interest, while the nectar-rich blooms attract pollinators. Drought-tolerant and hardy to -10°C, it thrives in full sun and well-draining soil. Perfect for coastal gardens, rockeries, and wildlife-friendly landscapes.

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Origin: West coast of the USA, namely California and Oregon

Genus: Ceanothus

Species / Cultivar: thyrsiflorus var. repens

Common Name: Creeping blue blossom, California lilac

Synonym: Ceanothus repens

Soil: Well drained

Soil that does not show much signs of moisture, either visibly or when handled.

Growth Rate: Medium

Expect to see moderate growth during growing season.

Water Requirement: Low

Will grow in a drier position and is unlikely to need regular watering once established.

Maintenance: Low

Minimal skill or input needed beyond the basics, a very independent plant.

Situation: Full Sun

Wants direct, unfiltered sunlight most of the day, such as a south facing position.

Eventual Height: 0.5-1m

The plant's ultimate height in typical growing conditions.

Eventual Spread: 2.5-4m

The plant's ultimate spread in typical growing conditions.

Hardiness: Hardy

Survives unprotected in an average winter. May need protection in extreme long frosts.

Habit: Evergreen

Always in leaf throughout the year. It won't lose all its leaves at any one time.

Care & Size Guidance

Ceanothus thyrsiflorus var. repens, a low-growing evergreen shrub, thrives in well-draining soil and full sun. Its arching branches form a dense, spreading habit, making it ideal for ground cover or slopes. Water regularly during establishment, then reduce watering, as it is drought-tolerant once mature.

Prune lightly after flowering to maintain shape and encourage dense growth. Hardy to around -10°C, it prefers sheltered spots in colder regions. In spring and early summer, it produces masses of pale blue flowers, attracting pollinators and adding vibrant colour to the landscape.