Common Cotton-Grass thrives in consistently moist to wet conditions. Water regularly to keep the soil saturated, especially during the growing season.

Avoid letting the soil dry out completely, as this can stress the plant. Raised bog gardens or pond margins are ideal locations.

Pruning is minimal for Common Cotton-Grass. Remove any dead or faded foliage in late winter or early spring before new growth emerges. This helps maintain a tidy appearance and prevents disease.

Cut back stalks close to the ground.

Propagate Common Cotton-Grass by division in early spring. Carefully lift established clumps and separate them into smaller sections, ensuring each section has roots and shoots.

Replant divisions immediately into moist soil.

Repotting is rarely needed for Common Cotton-Grass as it prefers to be in consistently wet environments and can spread. If container-grown plants become overcrowded, they can be divided and repotted or planted into larger containers or directly into a suitable bog garden.