Water Lomandra longifolia regularly during its establishment phase. Once established, it is highly drought-tolerant and requires infrequent watering, especially in cooler months.

Allow the soil to dry out between waterings to prevent root rot, as it prefers well-drained conditions.

Pruning is minimal and primarily involves removing dead or yellowed foliage at any time of the year. To rejuvenate an older plant, cut back the entire clump by about one-third to one-half in late winter or early spring before new growth emerges.

Lomandra longifolia can be propagated by division of established clumps in spring or autumn. Seeds can also be sown, but germination can be slow and erratic.

Division is the most common and successful method for home gardeners.

Repotting is rarely necessary for Lomandra longifolia as it is a slow-growing, clumping perennial. If a container-grown plant becomes root-bound, it can be repotted into a slightly larger container in spring.

However, it is best planted in the ground where it can thrive.