Foxtail Bristle-grass prefers consistently moist soil but is drought-tolerant once established. Water deeply when the top inch of soil feels dry. Avoid waterlogged conditions, which can lead to root rot.

Reduce watering in cooler months when growth slows down.

Pruning is generally not required for Foxtail Bristle-grass, as it is grown for its ornamental plumes. If desired, spent flower stalks can be trimmed back in late winter or early spring before new growth emerges to maintain a tidy appearance.

Propagate Foxtail Bristle-grass by seed. Sow seeds directly into the garden after the last frost or start them indoors a few weeks prior. Seeds germinate readily in warm soil.

Division of established clumps is also possible in spring.

Repotting is generally not applicable as this is typically grown as an annual or in the landscape. If grown in containers and it becomes root-bound, repot in spring into a slightly larger pot with fresh potting mix.