Brachypodium flexum prefers consistently moist soil, especially during establishment. Water regularly to maintain even moisture, but avoid waterlogged conditions which can lead to root rot.

Reduce watering slightly in drier periods, allowing the top few centimeters of soil to dry out between waterings.

Pruning is minimal. In late winter or early spring, before new growth emerges, remove any dead or damaged foliage from the previous season. This tidies the plant and encourages fresh, healthy shoots.

Cut back to just above ground level.

Brachypodium flexum can be propagated by division. In spring or early autumn, carefully dig up the plant and divide the root ball into smaller sections, ensuring each section has a good amount of roots and shoots.

Replant divisions immediately into well-prepared soil.

Repotting is typically only necessary for container-grown specimens.

If the plant becomes root-bound, indicated by roots circling the pot or emerging from drainage holes, repot in spring into a slightly larger container with fresh, well-draining potting mix. Ensure adequate drainage.