Ideally, the oleander (Nerium oleander) is pruned after blooming. All types — spring or free-bloomers - should be pruned by the end of August or early September to give any new growth sufficient time to harden off before winter.

When should you cut back oleanders?

Generally, the time to prune most spring flowering shrubs is late summer or autumn, or just after blooming. This gives the plants a chance to develop the new growth on which next season's blossoms will grow. However, summer flowering shrubs, like oleander, should be pruned in late winter or spring.

Can you prune Nerium oleander?

Pruning oleander bushes isn't essential but is often necessary to reduce the plant size, especially if moving from outdoors in summer to overwinter under cover. Ideally prune in late winter or early spring but pruning can be done in autumn if necessary.