[header] How to prune oleander [title] Prune in late summer or early fall. [step] On the whole, oleanders are low-maintenance plants that don't need regular pruning. However, you should aim to do a major pruning of your oleander at least once a year during late summer or early fall. 
This pruning will help you shape your plant and stimulate healthy growth. [substeps] Pruning at this time won't interfere with the blooming of the plant, because it is after the plant has already bloomed for the season.