Coastal Sagebrush thrives in well-drained soil and requires minimal watering once established. Water deeply but infrequently, allowing the soil to dry out completely between waterings.

Overwatering can lead to root rot, especially in cooler months. Reduce watering significantly during dormancy.

Prune in late spring or early summer after flowering to shape the plant and encourage denser growth. Remove dead or damaged branches at any time.

Heavy pruning can be done in late winter or early spring before new growth begins, but avoid cutting into old wood as it may not resprout.

Coastal Sagebrush can be propagated from seeds sown in autumn or early spring, or from semi-hardwood cuttings taken in summer. Seeds require stratification.

Cuttings should be rooted in a well-draining medium in a warm, humid environment. Successful propagation often requires patience.

Repotting is rarely necessary for mature Coastal Sagebrush plants, as they prefer to be slightly root-bound and thrive in well-drained, open ground. If a container-grown plant becomes severely root-bound, repot it in early spring into a slightly larger pot with a gritty, fast-draining mix.