Hemp-Leaf-MarshmallowAlthaea cannabina

Water regularly, especially during dry periods, to keep the soil consistently moist but not waterlogged. Reduce watering in autumn and winter.

Ensure good drainage to prevent root rot, as this plant prefers moist conditions but dislikes sitting in standing water.

Prune back old stems in late winter or early spring to encourage new growth and maintain a tidy shape. Deadhead spent flowers to promote further blooming and prevent self-seeding if desired.

This plant is quite forgiving with pruning.

Propagate from seed sown in spring, either directly outdoors or in a propagator. Softwood cuttings can be taken in late spring or early summer and rooted in moist, well-draining compost.

Division of established clumps in spring is also effective.

Repot young plants annually or as needed to provide fresh soil and more space. Mature plants generally do not require frequent repotting and can be left in place for several years, benefiting from a top-dressing of compost instead.