Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Rhamnaceae

Genus:

Ceanothus

Species:

Ceanothus thyrsiflorus var. thyrsiflorus

Growth Characteristics

Growth Habit:

Tree , Shrub

Height:

600 cm

Drought Tolerance:

Medium

Bloom Months:

mar,apr,may,jun

Bloom Colors:

blue, violet

Evergreen Shrub:

Yes

Landscaping Shrub:

Yes

Keystone Species Ranking

Caterpillar Keystone:

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

Garden & Ecology Notes

Wildlife Value:

bees, butterflies, birds, hummingbirds

Deer Resistant:

Yes

Salt Tolerant:

Yes

Fragrant:

Yes

Fire Ecology:

Requires fire for germination

Fire Notes:

Seeds germinated by heat and chemical cues from fire. Plants resprout vigorously from root crown after fire and establish seedlings in post-fire conditions.

Source: Claude claude-sonnet-4-5-20250929 Batch

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–90 days

Scarification:

Seed coat scarification required before sowing

Germination Time:

14–60 days

Notes:

Seeds benefit from hot water scarification or smoke treatment. Germination often erratic; fresh seed germinates better than stored seed.

Source: Claude claude-sonnet-4-5-20250929 Batch