Glyceria arundinacea thrives in consistently moist to wet conditions. Water regularly, ensuring the soil never dries out completely. It can tolerate waterlogged soil and is often used in aquatic or marginal plantings.

Reduce watering slightly during dormancy but maintain consistent moisture.

Pruning is primarily for aesthetic purposes and to manage spread. Remove dead or dying foliage at any time.

In late autumn or early spring, cut back the entire plant to about 5-10 cm above the ground to encourage fresh growth and maintain tidiness. Divide clumps as needed.

Glyceria arundinacea is easily propagated by division of established clumps in spring or autumn. Simply dig up the plant, separate the rhizomes or crowns into smaller sections, ensuring each section has roots and shoots, and replant immediately into moist soil.

As a vigorous grass, Glyceria arundinacea may require repotting every 2-3 years, especially when grown in containers, to prevent overcrowding and replenish soil nutrients. Repot in spring or autumn, dividing the root ball as needed and using fresh, moist potting mix.