The answer to 'why is my landscape lighting dying plants' is that your landscape lighting may be causing too much heat or light exposure for the plants, leading to stress and potential death. Landscape lighting, especially older or improperly installed systems, can generate excessive heat or direct light that can damage or kill plants over time.
Some common symptoms include wilting, discoloration, or stunted growth in the plants near the lighting fixtures. To solve this issue, you'll need to evaluate the placement, intensity, and type of lighting you're using and make adjustments to reduce the impact on your plants.