Calamagrostis brachyathera prefers consistently moist soil, especially during its active growth period. Water deeply when the top few centimeters of soil feel dry.

Avoid waterlogged conditions, as this can lead to root rot. Reduce watering slightly in cooler months or during dormancy.

Prune Calamagrostis brachyathera back to about 10-15 cm above the ground in late winter or early spring before new growth begins. This removes dead foliage from the previous season and encourages vigorous new shoots.

Remove any dead or damaged foliage throughout the year.

Propagation is typically done through division of established clumps in early spring. Carefully dig up the plant and separate the root ball into smaller sections, each with viable shoots and roots.

Replant divisions immediately into well-prepared soil.

Repotting is generally not necessary for this grass as it is often planted directly in the ground. If grown in a container, repot in early spring when the plant becomes root-bound, usually every 2-3 years, into a slightly larger pot with fresh potting mix.