Water regularly, especially during the first growing season, to establish a strong root system. Once established, Diervilla sessilifolia is quite drought-tolerant.

Allow the soil to dry out slightly between waterings to prevent waterlogging, which can lead to root rot.

Prune in late winter or early spring before new growth begins. Remove any dead, damaged, or crossing branches. Light pruning can be done after flowering to maintain shape and encourage bushier growth.

Heavy pruning can be done to rejuvenate older plants.

Diervilla sessilifolia can be propagated by softwood cuttings taken in late spring or early summer. Hardwood cuttings can also be taken in late autumn or early winter.

Division of established clumps in early spring is another effective method for increasing plant numbers.

Repotting is typically only necessary for container-grown plants.

If the plant becomes root-bound in its container, which is uncommon for this hardy shrub, repot in early spring into a slightly larger container with fresh potting mix. Ensure good drainage.