Water regularly, especially during prolonged dry spells, to maintain consistent soil moisture. Allow the top few centimeters of soil to dry out between waterings.

Avoid waterlogged conditions, as this can lead to root rot. Reduce watering in the dormant winter months.

Prune in late winter or early spring before new growth emerges. Cut back stems to about 15-20 cm from the ground to encourage a bushier habit and stimulate new flowering stems.

Remove any dead, damaged, or crossing branches to improve air circulation and plant health.

Spreading Dogbane can be propagated by division of clumps in early spring or from seed sown in autumn. Seedlings may require stratification.

Cuttings can also be taken from softwood in early summer, but division is the most reliable method for established plants.

Repotting is rarely necessary for established plants, as Spreading Dogbane prefers to be somewhat root-bound.

If grown in a container, repot every 2-3 years in early spring into a slightly larger pot with fresh, well-draining soil. This is also a good time to divide overgrown clumps.