The answer to 'why is my hedge pests' is that your hedge may have a pest infestation, which can cause damage and disrupt the health of your plants. Common hedge pests include aphids, spider mites, scale insects, and caterpillars. These pests feed on the leaves, stems, and sap of the hedge plants, leading to stunted growth, discoloration, and even death of the plants.
To identify and address the pest problem, look for signs of infestation such as visible pests, webbing, or discolored or wilting foliage. If the infestation is mild, you may be able to address it with DIY methods like hand-picking pests, using insecticidal soap, or introducing natural predators. However, for more severe or persistent infestations, it's best to consult with a professional landscaping technician who can diagnose the issue and recommend the most effective treatment options.