Water thoroughly when the soil is dry to the touch, typically every 1-2 weeks during the growing season. Reduce watering significantly in winter to prevent root rot.

Ensure good drainage to avoid waterlogged conditions, as Echium asperrimum prefers drier soil.

Prune after flowering to remove spent flower spikes and maintain shape. Cut back stems to a desired length, encouraging bushier growth. Deadhead spent blooms to prevent seed production if desired.

Light pruning can be done anytime to remove damaged foliage.

Propagate from seeds sown in spring, or from semi-hardwood cuttings taken in summer. Seeds may require stratification.

Cuttings should be treated with rooting hormone and kept in a warm, humid environment until established. Patience is key for successful propagation.

Repot young plants annually in spring, or when root-bound. Mature plants can be repotted every 2-3 years. Use a well-draining potting mix, such as a cactus or succulent blend.

Choose a pot only slightly larger than the previous one.