Allow the soil to dry out completely between waterings. Gomphocarpus filiformis is drought-tolerant once established. Overwatering can lead to root rot, especially in poorly draining soil.

Reduce watering significantly during cooler months when the plant is dormant.

Prune in early spring to shape the plant and remove any dead or damaged stems. Light pruning throughout the growing season can encourage bushier growth.

Remove spent flower stalks to prevent seed formation if desired, though this is not essential for plant health.

Gomphocarpus filiformis can be propagated by seeds or stem cuttings. Sow seeds in spring after a period of cold stratification.

Stem cuttings can be taken in spring or summer, treated with rooting hormone, and planted in well-draining soil. Ensure cuttings are from healthy, disease-free parent plants.

Repot young plants annually or every two years in spring. Mature plants can be repotted less frequently, only when root-bound. Use a well-draining potting mix, such as a cactus or succulent blend.

Choose a pot only slightly larger than the current one to avoid waterlogged soil.