Harmal Peganum prefers well-drained soil and is drought-tolerant 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 in winter.

Prune in late winter or early spring before new growth begins. Remove any dead, damaged, or crossing branches to maintain shape and promote airflow. Light trimming can be done after flowering to encourage bushier growth.

Avoid heavy pruning as it can stress the plant.

Propagation is typically done from seeds sown in spring, either directly outdoors or in a greenhouse. Stratification may improve germination rates.

Cuttings can also be taken from semi-hardwood in late summer, but success rates can be variable.

Repot young plants annually or every two years in spring. Mature plants are best left undisturbed as they dislike root disturbance. Choose a pot with excellent drainage and use a well-draining, gritty potting mix.

Repot only when the plant is severely root-bound.