Water Yellowstone Whitlow-grass sparingly, allowing the soil to dry out between waterings. It prefers well-drained conditions and is susceptible to root rot if overwatered, especially in cooler months.

Monitor soil moisture and water only when the top few centimeters feel dry to the touch.

Pruning is generally not required for Yellowstone Whitlow-grass beyond removing spent flower stalks to maintain a tidy appearance.

If the plant becomes leggy, a light trim after flowering can encourage a more compact form. Dead foliage can be removed at any time.

Propagate Yellowstone Whitlow-grass by seed or division. Sow seeds in early spring, either directly outdoors or in a cold frame.

Divisions can be made in early spring or fall, ensuring each division has adequate roots and foliage. Water gently after transplanting.

Repotting is rarely necessary for Yellowstone Whitlow-grass due to its small size and potential for self-seeding. If repotting is required, do so in early spring before new growth begins.

Use a well-draining potting mix and a shallow container to avoid excess moisture retention.