Acanthus dioscoridis prefers well-drained soil and should be watered moderately during the growing season, allowing the soil to dry slightly between waterings.

Reduce watering significantly in winter to prevent root rot, especially if grown in cooler climates or overwintered indoors. Ensure good drainage to avoid waterlogging.

Prune back dead or spent flower stalks after blooming to maintain a tidy appearance. In late autumn or early spring, cut back all remaining foliage to the ground to encourage fresh growth.

This also helps to prevent overwintering pests and diseases from establishing in the plant.

Propagate Acanthus dioscoridis by division of established clumps in early spring. Carefully separate root sections with at least one bud and plant them into well-draining soil.

It can also be propagated from seed sown in autumn or early spring, though germination can be erratic.

Repot Acanthus dioscoridis only when necessary, typically every 2-3 years, or when the plant becomes pot-bound. This is best done in early spring before new growth begins.

Use a pot with good drainage and a well-draining, gritty compost mix to accommodate its root system.