Water Thunberg's Lespedeza regularly during its establishment phase, especially in the first year. Once established, it is quite drought-tolerant and prefers to dry out slightly between waterings.

Avoid overwatering, as this can lead to root rot. Reduce watering in the fall.

Prune in late winter or early spring before new growth emerges. Cut back dead or weak stems to the ground.

To encourage bushier growth and more abundant blooms, you can cut back the plant by about one-third to one-half of its height. Remove any winter damage.

Propagate Thunberg's Lespedeza from softwood cuttings taken in early summer. Root cuttings in a well-draining potting mix, keeping them moist and in a humid environment.

Seed propagation is also possible, but cultivars may not come true to type. stratification may improve germination.

Repotting is rarely necessary for Thunberg's Lespedeza as it is typically grown as a shrub or in garden beds.

If grown in a container and it becomes root-bound, repot in spring to a slightly larger container with fresh, well-draining potting mix. Ensure the new pot has adequate drainage holes.