Nassella caespitosa is drought-tolerant once established. Water deeply but infrequently, allowing the soil to dry out completely between waterings.

Avoid overwatering, especially during cooler months, as this can lead to root rot. Monitor soil moisture, particularly in hot, dry conditions.

Pruning is typically done annually to maintain a tidy appearance. Cut back the entire plant in late winter or early spring before new growth emerges. This removes dead foliage and encourages fresh, healthy growth.

Deadheading spent flower stalks can prevent unwanted reseeding if necessary.

Nassella caespitosa can be propagated by seed or division. Seeds can be sown in autumn or early spring, ideally in well-draining soil. Division of established clumps is best performed in early spring or autumn.

Ensure divisions have adequate roots and moisture for successful establishment.

Repotting is generally not necessary for this species, as it is typically grown in the ground. If container-grown specimens become root-bound, repot them into a larger container in spring using a well-draining soil mix.

However, its preference is for drier, well-drained conditions.