Lakeside ceanothus
Ceanothus cyaneus
Last reviewed: October 2026
Lakeside ceanothus (Ceanothus cyaneus) is a perennial shrub native to CA. It blooms in March, April, and May. The flowers draw bees.
Toxicity unknown
Lakeside ceanothus (Ceanothus cyaneus) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
72"–144" H × 72"–120" W
Bloom
Mar, Apr, May
Native to
CA
Pollinators
bees
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 460 programs across 44 states, each with a link to the provider and the date we last checked it.
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Browse plants for this ecoregion
Large evergreen shrub with glossy dark green leaves and dense clusters of vivid deep blue flowers in spring. Found on dry chaparral slopes.
Growing Lakeside ceanothus
Grow Lakeside ceanothus in full sun and low water. Mature plants reach 72 to 144 inches tall and spread 72 to 120 inches wide.
Wildlife value
Host plant for Ceanothus silkmoth, spring azure.
Flowers are highly attractive to native bees; foliage is a larval host for the Ceanothus silkmoth and spring azure butterfly.
Common questions
- How much sun does Lakeside ceanothus need?
- Lakeside ceanothus grows best in full sun conditions.
- When does Lakeside ceanothus bloom?
- Lakeside ceanothus blooms in March, April, and May.
- Where is Lakeside ceanothus native?
- Lakeside ceanothus (Ceanothus cyaneus) is native to CA, per vouchered herbarium specimen records and regional native plant society lists.
- What butterflies or moths does Lakeside ceanothus host?
- Lakeside ceanothus is a larval host plant for Ceanothus silkmoth and spring azure.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow Lakeside ceanothus? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.