Water regularly, especially during the first year and during dry spells. Amsonia tabernaemontana prefers consistently moist soil but can tolerate short periods of drought once established.

Avoid waterlogged conditions, which can lead to root rot. Water at the base of the plant to minimize fungal issues.

Prune in late spring or early summer after flowering to maintain a tidy shape and encourage a possible rebloom. Cut back stems by about half.

In late fall or early winter, cut back dead foliage to the ground to prevent disease overwintering and promote a clean start in spring.

Propagate by division in early spring. Dig up the plant and carefully divide the root ball into sections, each with several healthy shoots. Replant divisions immediately into well-prepared soil.

Stem cuttings can also be taken in late spring or early summer and rooted in moist potting mix.

Young plants may benefit from repotting every 2-3 years in early spring to refresh the soil and provide more space. Mature plants are best left undisturbed as they dislike root disturbance.

If repotting is necessary, use a slightly larger pot with good drainage and fresh potting mix.