Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Rhamnaceae

Genus:

Ceanothus

Species:

Ceanothus impressus

USDA Symbol:

CEIM

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Shrub , Tree

Height:

300 cm

Light Requirements:

Part Shade

Drought Tolerance:

High

Bloom Months:

mar,apr,may

Bloom Colors:

blue, violet

Landscaping Shrub:

Yes

Wildlife Benefits

Bees:

★☆☆☆☆ Documented bee visitation (GBIF)

Butterflies & Moths:

★☆☆☆☆ Documented Lepidoptera association (GBIF)

Keystone Species Ranking

Caterpillar Keystone:

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

Garden & Ecology Notes

Wildlife Value:

bees, butterflies, birds

Deer Resistant:

Yes

Fire Ecology:

Requires fire for germination

Fire Notes:

Seeds have hard seed coats that require heat or fire scarification for germination. Resprouts vigorously from root crown after fire in some populations.

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 coastal California chaparral

Propagation & Germination

Stratification:

Warm then cold/moist stratification (double dormancy) — 90–120 days

Scarification:

Seed coat scarification required before sowing

Germination Time:

30–90 days

Notes:

Hot water treatment or scarification followed by cold stratification improves germination. Smoke treatment may also enhance germination.

The above propagation data sourced from Claude AI