Finestem Needlegrass prefers to dry out between waterings. Water thoroughly when the top 5 cm of soil feels dry. Avoid waterlogging, as this can lead to root rot.

Reduce watering significantly during winter dormancy, only watering if the soil becomes completely dry.

Prune in late winter or early spring before new growth emerges. Cut back the old, dead foliage to about 5-10 cm from the ground. This encourages vigorous new growth and maintains the plant's tidy appearance.

Remove any dead or damaged leaves throughout the growing season as needed.

Propagate Nassella tenuissima by division in early spring or by seed. Sow seeds indoors in late winter or directly outdoors after the last frost.

Divisions should be made from mature clumps, ensuring each section has roots and shoots. Transplant divisions or seedlings to their final location.

Repotting is generally not necessary for established plants grown in the ground. Container-grown specimens may benefit from repotting every 2-3 years into a slightly larger pot, preferably in early spring.

Use a well-draining potting mix to prevent moisture retention.