Cooley's Bundleflower is drought-tolerant once established. Water deeply but infrequently, allowing the soil to dry out completely between waterings. Overwatering can lead to root rot, so ensure good drainage.

Reduce watering significantly during cooler months to prevent waterlogging.

Pruning is primarily for shaping and removing dead or damaged branches. Light pruning can be done after flowering to maintain a tidy appearance and encourage bushier growth.

Avoid heavy pruning, especially in late fall, as it can reduce winter hardiness.

Cooley's Bundleflower can be propagated by seeds, which benefit from scarification or stratification. Cuttings can also be taken from semi-hardwood in late summer.

Plant seeds or cuttings in well-draining soil and maintain consistent moisture.

Repotting is rarely necessary as this species prefers to be slightly root-bound and is best left undisturbed. If you must repot, do so in early spring before new growth begins.

Use a well-draining potting mix and a pot only slightly larger than the current one.