Answer: Pruning the tops and sides of your oleanders will make them thicken up and become dense. Start by pruning them back with hedge trimmers, taking from 4-6" off all around. They will respond by branching out where the stems have been cut, plus they will produce new leaves in the center of the plant. You can prune them back again in fall, and again in March or April.
Best wishes with your oleanders.
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