Agrostis alpina prefers consistent moisture but dislikes waterlogged soil. Water thoroughly when the top centimeter of soil feels dry.

Reduce watering in cooler months to prevent root rot, ensuring the soil doesn't remain saturated.

Pruning is generally not required for Agrostis alpina, as it maintains a compact form. However, you can lightly shear it in late spring or early summer to encourage denser growth and remove any winter-damaged foliage.

Agrostis alpina can be propagated by division in early spring. Carefully separate clumps of the grass, ensuring each division has roots and shoots. Replant immediately into well-draining soil.

Repotting is typically unnecessary for Agrostis alpina as it is a perennial grass often grown in the ground or in containers where its size is managed by the pot. If container-grown and root-bound, repot in spring.