Photo by Melody

PlantFiles: Blueblossom Ceanothus, California Lilac, Blue Brush
Ceanothus thyrsiflorus 'Skylark'

Family: Rhamnaceae
Genus: Ceanothus (see-an-OH-thus) (Info)
Species: thyrsiflorus (thur-SEE-flor-us) (Info)
Cultivar: Skylark

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One member has or wants this plant for trade.


4-6 ft. (1.2-1.8 m)

4-6 ft. (1.2-1.8 m)

USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Full Sun

Unknown - Tell us

Bloom Color:
Dark Blue

Bloom Time:
Late Spring/Early Summer


Other details:
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

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to view:

By Pianokey59
Thumbnail #1 of Ceanothus thyrsiflorus by Pianokey59


3 positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral MulchingMan On Mar 26, 2014, MulchingMan from Eugene, OR wrote:

This is a really nice plant that roots and grows vigorously. Foliage and flowers are nice as well. However, despite being somewhat tolerant of summer water, it has its limits. We had an unusually-wet September last year where we received 7" of rain during the last two weeks. My 'Skylark' responded by dropping most of its root system. It'll work in the Pacific Northwest in most years, but be prepared to take occasional losses during those freak weather events.

Positive suewylan On Sep 29, 2010, suewylan from North Fork, CA (Zone 7b) wrote:

Ceanothus thyrsiflorus 'Skylark'

Positive bastowp On Feb 26, 2008, bastowp from Brighton
United Kingdom wrote:

I grow 1000's of ceanothus a year through work, and I'd say this is the best ceanothus variety on the UK market. Its very vigourous but has lovely shiny dark green foliage all year round.

It requires a hard prune after flowering. Cut away the seeding heads after flowering.

The UK is Zone 8 and all the ceanothus varities we grow cope well throughout the UK.

Neutral berrygirl On Mar 17, 2007, berrygirl from Braselton, GA (Zone 7b) wrote:

Ceanothus thyrsiflorus 'Skylark' BLUE BLOSSOM EG (z7) (Hon,Fra,Bfly)
Profuse dark-blue flowers cover this shrub (to 3-6'tall x 5'wide) in e.summer &, added bonus (as if one was needed!): this tolerates summer water better than most Cea.--better prospect for eastern gardens?.S/M-D

Positive fluffygrue On Jun 29, 2006, fluffygrue from Manchester
United Kingdom (Zone 8a) wrote:

Lovely little Ceanothus. Unlike some other cultivars, the flowers on this seem to go well with the foliage colour, as they're a paler blue than most. Seems to flower much longer than others.


This plant has been said to grow in the following regions:

San Francisco, California
Fort Mill, South Carolina

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