White Cottongrass thrives in consistently moist conditions. Water frequently, ensuring the soil never dries out completely.

It prefers boggy or waterlogged environments, so consider planting it in a location that retains moisture or even with its roots submerged in shallow water.

Pruning is minimal for White Cottongrass. Remove any dead or yellowing foliage at any time of the year to maintain a tidy appearance.

Cut back old flowering stems after they have finished blooming to prevent self-seeding if unwanted, though this is rarely an issue.

Propagate White Cottongrass by division in early spring or by seed. Sow seeds in moist soil in a cold frame or directly outdoors in spring.

Division is the most common method, carefully separating clumps and replanting them into moist soil.

Repotting is usually only necessary if the plant becomes overcrowded or is grown in a container. Do this in early spring before new growth begins.

If grown in a pond or bog garden, it rarely requires repotting and can spread naturally.