Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Rhamnaceae

Genus:

Ceanothus

Species:

Ceanothus oliganthus

USDA Symbol:

CEOL

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Shrub

Height:

400 cm

Light Requirements:

Full Sun

Drought Tolerance:

High

Bloom Months:

mar,apr,may

Bloom Colors:

blue, lavender

Evergreen Shrub:

Yes

Landscaping Shrub:

Yes

Wildlife Benefits

Bees:

★☆☆☆☆ Documented bee visitation (GBIF)

Butterflies & Moths:

★★★☆☆ Documented Lepidoptera association (GBIF)

Caterpillars:

★★☆☆☆ Recorded caterpillar host plant (HOSTS Database)

Keystone Species Ranking

Caterpillar Keystone:

★★★★☆ Butterfly & moth species supported by this genus (NWF)

Host Plant for Caterpillars

Garden & Ecology Notes

Wildlife Value:

birds, butterflies, bees

Fragrant:

Yes

Fire Ecology:

Fire adapted — tolerates or benefits from fire

Fire Notes:

Resprouts from root crown after fire; seeds also germinate in response to fire cues.

Soil Requirements

Soil Type:

sandy, well-drained, nutrient-poor soil

pH:

5.5 - 7.5 (slightly acidic to neutral)

Drainage:

excellent drainage required

Moisture:

dry to moderate

Notes:

native to chaparral and coastal scrub areas

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–60 days

Scarification:

Seed coat scarification required before sowing

Germination Time:

30–90 days

Notes:

Seeds require scarification (hot water or mechanical) followed by cold stratification for germination.