Ceanothus arboreus is a plant that is native to California. It is also known as the tree anemone. This plant grows to a height of 10-15 feet and has a spread of 6-8 feet. The leaves are dark green and glossy, and the flowers are white or pale blue. The fruit is a blackberry-like drupe.
Related plant:
Ceanothus Blue Mound
About soil condition, it prefers well-drained soils, but it is not drought tolerant and will require supplemental irrigation in hot summer weather. The tree will also benefit from periodic deep watering and mulching to keep the roots cool and moist.
Just like other Californian native plants, the Coastal California Blue Bush (Ceanothus arboreus) has low water requirements and prefers full sun. The sun not only dries out the bush's leaves, but it also helps produce the bush's unique blue color. If you live in an area with high summer temperatures, this bush is a perfect choice for your landscape.
The temperature condition of the ceanothus arboreus is warm. It cannot tolerate cold temperatures and will suffer frost damage if exposed to them. It is best to grow this plant in an area that receives full sun and has well-drained soil.
Ideal humidity condition for this plant is around 50%. They are drought resistant and do not need too much water. Too much water can actually be harmful to them. They do like moisture in the air though so a humidifier can be beneficial.
The fertilizer, usually the plant food, is a mainstay in the growth and development of the (ceanothus arboreus). The root is the part of the plant that helps to secure and support the plant in the soil. It also helps to anchor the plant and absorb water and nutrients from the soil.
Pruning is a vital part of keeping your California lilac (Ceanothus arboreus) looking its best. This tough, fast-growing shrub can quickly become overgrown and leggy if left unpruned. Luckily, pruning is easy to do and California lilacs respond well to being cut back. For the best results, prune your California lilac in late winter or early spring, before new growth begins.
Propagation is best done through seed, as cuttings may be difficult to root. Sow the seeds in a cold frame in late winter or early spring. scarify the seeds by nicking the seed coat with a sharp knife. This will help the seed to germinate. Plant the seeds 1/4 inch deep in a well-drained seed starting mix. Keep the soil moist but not wet and the seeds should germinate in 21-28 days. Once the seedlings are large enough to handle, transplant them into 4-inch pots. transplant them into the garden in the spring after all danger of frost has passed.
Usually, the plant growth rate during the spring and summer, when the plant is actively growing. However, some plants may continue to grow during the fall and winter months. The plant's growth rate is determined by the amount of sunlight, water, and nutrients available to the plant.
Common problems for this kind of plant are stem and root rots, and aphids. Stem and root rots can be caused by different fungi, including Pythium and Phytophthora. These fungi can be a problem in wet or poorly drained soils. Aphids are small, soft-bodied insects that can suck the sap out of plants. They are usually found in large numbers on new growth.
Source:
Ceanothus 'Dark Star' | Landscape Plants - Oregon State University
Ceanothus americanus - North Carolina State University
Marie Simon ceanothus | UC Davis Arboretum and Public Garden