Water regularly during the growing season, allowing the soil to dry out slightly between waterings. Reduce watering significantly in winter to prevent root rot.

Ensure good drainage to avoid waterlogged conditions, as it is drought-tolerant once established.

Pruning is generally not required for Trianthema portulacastrum. If desired for shaping or to remove dead or damaged stems, prune lightly in spring. This plant naturally forms a low-growing, spreading habit.

Heavy pruning can be done to control its spread if necessary.

Propagate from seeds sown directly in well-draining soil after the last frost, or start indoors a few weeks prior. Stem cuttings can also be taken during the growing season and planted in moist soil or water; they root easily.

Repot young plants annually in spring to provide fresh soil and more space. Mature plants can be repotted every 2-3 years or when root-bound.

Use a well-draining potting mix, such as a cactus or succulent blend, and ensure the new pot has drainage holes.