The answer to 'why is my hedge pests' is that your hedge may be infested with common pests like aphids, spider mites, or caterpillars. These pests can damage the leaves, flowers, and overall health of your hedge.
Signs of a pest infestation include discolored or wilting leaves, sticky residue, and visible insects on the plant. To solve the issue, you'll need to identify the specific pest and treat it accordingly, either through DIY methods or by calling in a professional landscaper.