Mazus arenarius prefers consistently moist soil. Water regularly, especially during dry periods, to prevent the soil from drying out completely. Avoid waterlogged conditions, as this can lead to root rot.

Aim for soil that feels damp to the touch, but not saturated.

Pruning is typically minimal for Mazus arenarius. Dead or faded flower stalks can be trimmed back to maintain a tidy appearance.

If the plant becomes leggy, you can lightly trim it back in late spring or early summer to encourage bushier growth and more flowering.

Mazus arenarius can be easily propagated by division. In early spring or fall, carefully dig up the plant and divide the root mass into smaller sections, ensuring each section has some roots and shoots.

Replant the divisions immediately into well-prepared soil.

Repotting is usually only necessary if the plant becomes root-bound or outgrows its container. This is best done in early spring before new growth begins.

Gently loosen the roots and replant into a slightly larger pot with fresh, well-draining potting mix.