Water regularly during the first year to establish roots. Once established, Curlycup Gumweed is very drought-tolerant. Allow the soil to dry out completely between waterings.

Overwatering can lead to root rot, especially in poorly draining soils.

Prune back dead or spent flower stalks in late fall or early spring to maintain a tidy appearance. This also encourages bushier growth. Remove any winter-damaged stems.

Minimal pruning is generally needed for this resilient plant.

Propagate from seeds sown in early spring, either directly outdoors or indoors a few weeks prior. Division of established clumps in spring is also an effective method.

Scarification of seeds can improve germination rates.

Repotting is rarely necessary for Grindelia squarrosa as it is typically grown in the ground and prefers well-drained soil. If grown in a container, repot only when root-bound, which is infrequent, using a gritty, well-draining potting mix in spring.