Casuarina collina prefers well-drained soil and can tolerate periods of drought once established. Water deeply but infrequently, allowing the soil to dry out slightly between waterings.

Avoid waterlogging, which can lead to root rot, especially in young plants. Reduce watering during cooler, dormant periods.

Pruning of Casuarina collina is typically done to shape the plant or remove dead, damaged, or crossing branches. Heavy pruning is usually not necessary and can be detrimental.

Prune in late winter or early spring before the main growing season to encourage vigorous new growth.

Propagation is best achieved through semi-hardwood cuttings taken in late summer or early autumn. Root cuttings in a well-draining medium with bottom heat.

Alternatively, seeds can be sown in spring, but germination can be slow and erratic. Grafting is also a possibility for specific cultivars.

Repot Casuarina collina when it becomes root-bound, typically every 2-3 years for younger plants and less frequently for mature specimens. Use a well-draining potting mix. Repot in spring just as new growth appears.

Ensure the new pot is only slightly larger than the previous one.