Mercurialis tomentosa prefers consistently moist soil, especially during its active growth period. Water thoroughly when the top 2-3 cm of soil feels dry.

Reduce watering in winter when the plant is dormant to prevent waterlogging and root rot. Ensure good drainage to avoid soggy conditions.

Prune Mercurialis tomentosa in early spring before new growth begins. Remove any dead, damaged, or crossing stems to maintain a tidy appearance and encourage bushier growth.

Light pinching of young shoots can also promote a more compact form. Avoid heavy pruning as it can stress the plant.

Propagate Mercurialis tomentosa from seed sown in spring or from basal cuttings taken in late spring. Seeds can be sown in a well-draining compost and kept moist and warm.

Cuttings should be rooted in a light, sandy soil mix and kept humid until established.

Repot Mercurialis tomentosa every 2-3 years in spring, or when the plant becomes root-bound. Use a slightly larger pot with a good quality, well-draining potting mix.

Gently tease out any circling roots before placing the plant in its new container to ensure healthy root development.