WSU Clark County Extension
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Blue Blossom

Scientific name: Ceanothus thyrsiflorus
Taxonomy
Family:Rhamnaceae
Type:Evergreen shrubs
Native:YES
Plant Requirements
Zone:7 to 9
Sun:Full to partial sun
Moisture:Dry
Plant Characteristics
Height:6 ft
Width:6 ft
Bloom:Showy flowers
Bloom Time:May to June
Bloom Color:Purple
Additional Characteristics
Trees


Fruit

Leaves


Bark
Wildlife value

Poisonous
Description Blue Blossom is best known for its deep lilac blue flowers which will completely cover the bush as it grows during the summer months.

  Morphology:
This is an evergreen shrub (a Northwest native as well) that grows to 4-12’ in height and width. It can be treated as either a small shrub or trained to form a small tree. If planted in multiples it could be used to form a hedge. It features bright shiny green leaves which are arranged in an alternate fashion. They are 2” long with pointed tips. Three prominent veins are on the underside of the leaves.

Flowers emerge in May and extend through June. They form in spike-like clusters. Seeds form from the spent flower clusters. Birds will feast on seeds as they mature.

  Adaptation:
This species does best in full sun but withstands some shade. It is highly drought tolerant once established. It prefers alkaline soils and good soil drainage.

  Pests:
None reported.
For assistance, contact Dr. Charles Brun (brunc@wsu.edu), (360) 397-6060 5701
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