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Ceanothus gloriosus
Point Reyes ceanothus
Coastal Marin County, California (Point Reyes National Seashore)Learn more
Overview
A prostrate to low-mounding evergreen shrub reaching 6–18 inches (15–45 cm) tall and spreading 4–8 feet (1.2–2.4 m) wide. Leaves are small, 0.5–1 inch (1.2–2.5 cm) long, broadly oval to nearly round, leathery, with distinctly holly-like toothed margins and a glossy dark green upper surface. Stems root where they contact soil over time, increasing spread. Flowers appear in dense clusters 0.5–1 inch (1.2–2.5 cm) across, blue to violet-blue, covering the plant in March and April. Individual blooms are small, 5-petaled; clusters held just above the foliage. Plants are short-lived by shrub standards, typically declining after 10–15 years. Stems become woody and irregular with age; the plant does not regenerate reliably from old wood if cut hard. Established plants are highly drought tolerant but do not recover from standing water or clay soils with poor drainage.
Native Range
Native to the coastal bluffs and headlands of Marin County, California, particularly around Point Reyes National Seashore. Grows on exposed coastal scrub, rocky outcrops, and stabilized sand dunes within 1–5 miles (1.6–8 km) of the Pacific Ocean at elevations below 500 feet (150 m). Restricted to a relatively narrow native range compared to other Ceanothus species.Suggested Uses
Used as a groundcover on dry, well-drained slopes and banks where erosion control is needed; effective on coastal sites exposed to salt wind. Planted at 4–5 foot (1.2–1.5 m) spacing for bank coverage. Not suitable for lawns, irrigated borders, or sites with clay soils. Functions as a habitat plant, providing nectar for native bees during early-season bloom.How to Identify
Appearance
Size & Dimensions
Height6" - 1'6"
Width/Spread4' - 8'
Reaches mature size in approximately 3 years
Colors
Flower Colors
Foliage Colors
Bloom Information
Flowers March through April in most garden settings, with peak bloom lasting 3–4 weeks. In mild coastal locations bloom may begin in late February. The flower clusters are dense and cover the plant when conditions are favorable, though bloom intensity varies by year. No reliable repeat bloom occurs after the spring flush.Detailed Descriptions
Flower Description
blue to violet-blueFoliage Description
glossy dark greenGrowing Conditions
Sun Requirements
Requires 6-8 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight
Care & Maintenance
Care Guide
Water regularly during the first growing season to establish the root system; once established, supplemental irrigation should be reduced to once or twice monthly in summer at most, as excess summer water is the primary cause of plant failure. Do not plant in clay soils or areas where water pools after rain. Avoid disturbing the root zone with cultivation once established, as Ceanothus roots are sensitive to disturbance. Fertilization is not recommended and can promote excessive growth that shortens plant life. Root rot (Phytophthora) develops rapidly in poorly drained soils, particularly in combination with summer irrigation. Plants are not reliably long-lived; expect replacement after 10–15 years.Pruning
Prune lightly immediately after flowering in late April or May to remove dead stems and tidy edges; do not cut into old woody stems, as the plant does not regenerate from leafless old wood. Remove individual dead or damaged branches as they appear. No shearing or hard renovation pruning — once a significant portion of the plant has died back, replacement is more reliable than cutting back.Pruning Schedule
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