Ceanothus integerrimus is a deciduous shrub from 1–4 metres (3.3–13 ft) tall with an open ascending to erect branch habit. It is a drought-tolerant phanerophyte. Nitrogen fixing actinomycete bacteria form root nodules on Ceanothus roots. Its stems are round yellow to a pale green in color with either small soft to straight stiff sharp hairs parallel to or in contact with the surface of the stem.
The leaves are glossy, deciduous and 2.5–8 cm long. Leaves grow alternately on stems. Leaf surfaces are light green and are ciliate or contain hairs visible only by magnification. The lower leaves are also hairy and lighter in color.
The flowers are white. They are produced in raceme clusters of 15 centimeters or less and contain both male and female organs. The fruit is a sticky valved capsule about 4–5 mm in diameter with a slight crest; the seed is ejected from the capsule after splitting.
Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers dry or moist soil.
Seed production occurs after about four years of age. High densities of seeds occur in the upper soil of Ceanothus communities. Seeds remain viable up to 24 years or more. Seed dormancy is broken by the removal of the seed coat by fire scarification or physical disturbance. Seeds germinate best at about 1 inch soil depth in shady areas in the spring following fire scarification.
Info source: Wikipedia
Genus - Ceanothus
Species - Integerrimus
Common name - Deer Brush
Pre-Treatment - Required
Hardiness zones - 7 - 10
Height - 6-18' / 1,50 - 4.50 m
Spread - 4-6' / 1.20 - 1.80 m
Plant type - Medium Shrub
Vegetation type - Evergreen
Exposure - Full Sun, Partial Shade
Growth rate - Medium
Soil PH - 6.6 to 7.5 (neutral)
Soil type - Clay, Loam, Sand
Water requirements - Average Water Needs; Water regularly; do not overwater
Landscape uses - Fragrant flowers
Bloom season - Spring - summer
Leaf / Flower color - Green / White
Seed - best sown in a cold frame. SeedS should be pre-soaked for 12 hours in warm water and then given 1 - 3 months stratification at +1-+3°c. Germination usually takes place within 1 - 2 months at 20°c after pre-chill (stratification).
One report says that the seed is best given boiling water treatment, or heated in 4 times its volume of sand at 90 - 120°c for 4 - 5 minutes and then soaked in warm water for 12 hours before sowing it. It then requires a period of chilling below 5°c for up to 84 days before it will germinate. The seed exhibits considerable longevity, when stored for 15 years in an air-tight dry container at 1 - 5°c it has shown little deterioration in viability. The seed is ejected from its capsule with some force when fully ripe, timing the collection of seed can be difficult because unless collected just prior to dehiscence the seed is difficult to extract and rarely germinates satisfactorily.
Prick out the seedlings into individual pots as soon as they are large enough to handle. Grow them on in the greenhouse for at least their first winter and plant them out into their permanent positions in late spring or early summer. Cuttings of half-ripe wood, taken at a node, July/August in a frame. Cuttings of mature wood of the current year's growth, 7 - 12 cm with a heel, October in a cold frame. The roots are quite brittle and it is best to pot up the callused cuttings in spring, just before the roots break. Good percentage.