Essential Tips for Pruning Butterfly Bushes 🦋🌸 pruning summer lilacs, also known as butterfly bushes, is essential for their health and the garden's biodiversity. These vibrant plants attract pollinators like bees and butterflies with their nectar-rich flowers, blooming from July to September. However, they can spread rapidly and may become invasive if not managed properly. annual pruning is recommended between December and February, avoiding frost and heavy sunlight for best results. A cloudy