Water Anchusa affinis regularly during its growing season, ensuring the soil remains consistently moist but not waterlogged. Reduce watering significantly during its dormant period in winter.

Allow the top layer of soil to dry slightly between waterings to prevent root rot.

Prune Anchusa affinis after flowering to maintain its shape and encourage a bushier growth habit. Remove spent flower stalks to prevent self-seeding, unless desired.

Cut back leggy stems to promote more compact growth for the following season.

Propagate Anchusa affinis by softwood cuttings taken in late spring or early summer. Alternatively, sow seeds indoors in early spring or outdoors after the last frost.

Division of established clumps in early spring is also an effective method.

Repot Anchusa affinis every two to three years, or when it becomes root-bound. Choose a pot that is only slightly larger than the current one. Repotting is best done in early spring before new growth begins.

Use a well-draining potting mix.