The answer to 'why is my fence dying plants' is that your fence may be blocking sunlight and airflow, causing plants near the fence to struggle. Fences can cast shadows that deprive plants of the sunlight they need to thrive, and they can also restrict air circulation around the plants, leading to disease and poor growth.
Some common symptoms of plants dying near a fence include stunted growth, yellowing or wilting leaves, and reduced flowering or fruiting. To address this issue, you may need to prune or trim back the fence, or consider moving the plants to a sunnier location. If the problem persists, it may be best to consult a professional landscaper or horticulturist who can assess the specific conditions and provide tailored recommendations.