Sunn Hemp is relatively drought-tolerant once established. Water deeply but infrequently, allowing the soil to dry out slightly between waterings. Avoid waterlogged conditions, as this can lead to root rot.

Reduce watering during cooler periods or if the plant is in a shaded location.

Pruning is generally not required for Sunn Hemp, especially when grown as a cover crop. If desired for shaping or to encourage bushier growth, light pruning can be done after flowering.

Remove any dead or damaged stems at any time to maintain plant health and appearance.

Sunn Hemp is typically propagated by seeds. Sow seeds directly into well-draining soil in spring or early summer, after the last frost. Seeds germinate readily in warm conditions.

No special treatment is usually needed, and propagation by cuttings is uncommon.

Repotting is not a common practice for Sunn Hemp, as it is often grown as an annual or cover crop. If grown in a container and it becomes root-bound, repot into a slightly larger container in spring.

Ensure the new pot has adequate drainage holes to prevent water accumulation.