Water moderately when young, especially during the first year after planting. Once established, Santa Barbara Ceanothus is very drought-tolerant and requires infrequent watering.

Allow the soil to dry out completely between waterings to prevent root rot. Overwatering is a common mistake.

Prune lightly after flowering to shape the plant and remove any dead or crossing branches. Avoid heavy pruning, as it can stimulate weak growth and make the plant susceptible to disease.

Early spring pruning before new growth appears is also an option for shaping.

Propagate from semi-hardwood cuttings taken in summer or from seed sown in autumn. Cuttings should be treated with rooting hormone and placed in a well-draining medium. Seed requires stratification for germination.

Patience is key for successful propagation.

Repotting is generally not recommended for Santa Barbara Ceanothus, as they dislike root disturbance. If absolutely necessary for container-grown plants, repot in early spring before significant new growth begins.

Use a well-draining potting mix and disturb the root ball as little as possible.