Herniaria austroamericana prefers well-draining soil and can tolerate dry conditions once established. Water thoroughly when the top inch of soil feels dry. Avoid overwatering, as this can lead to root rot.

Reduce watering frequency during winter months when the plant's growth slows down.

Pruning is typically done to maintain shape or to remove any dead or damaged stems. Light trimming can be done in spring or early summer to encourage bushier growth.

Avoid heavy pruning, as it may take time for the plant to recover.

Propagation can be achieved through seeds sown in spring, or by taking stem cuttings in late spring or early summer. Cuttings should be placed in well-draining potting mix and kept moist until they root.

Seeds may require stratification.

Herniaria austroamericana is a slow-growing plant and does not require frequent repotting. Repot only when the plant becomes root-bound, typically every 2-3 years.

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