Water Anchusa thessala regularly, especially during dry periods, but avoid waterlogging. Allow the top 2-3 cm of soil to dry out between waterings. In hot, dry climates, more frequent watering may be necessary.

Reduce watering in winter when the plant is dormant.

Prune Anchusa thessala after flowering to encourage a tidier appearance and potentially a second bloom. Remove spent flower stalks and any dead or damaged foliage.

Light pruning can help maintain its shape and prevent it from becoming too sprawling.

Propagate Anchusa thessala by sowing seeds in spring or autumn. Division of established clumps in spring is also an effective method.

Cuttings can be taken from semi-ripe shoots in summer, but this can be less reliable than seed or division.

Repot Anchusa thessala every 2-3 years, or when it becomes root-bound. The best time for repotting is in early spring before new growth begins.

Use a well-draining potting mix and a pot that is only slightly larger than the current one.