Water Grindelia Aegialitis moderately when the top 2-3 cm of soil feels dry. Avoid overwatering, as this can lead to root rot. Reduce watering during winter dormancy. Ensure good drainage to prevent waterlogging.

Prune Grindelia Aegialitis after flowering to shape the plant and encourage bushier growth. Remove dead or spent flower stalks.

Pruning in late winter or early spring before new growth begins is also beneficial to remove any winter damage.

Propagate Grindelia Aegialitis from seed sown in spring, or by taking stem cuttings in late spring or early summer. Seeds may require stratification.

Cuttings should be rooted in a well-draining potting mix and kept moist.

Repot Grindelia Aegialitis when it becomes root-bound, typically every 2-3 years. Use a well-draining potting mix, such as a cactus or succulent blend. Repot in spring before the active growing season begins.