Does dog urine kill plants?
Yes, urine is definitely damaging to plants. A one-time event usually isn't too big a deal, unless the plant is extra tender or with soft, new growth. But repeated events will definitely kill plants. It sounds as if the dog is marking this particular territory for some reason, which could then attract other dogs to mark there as well. So ultimately, if your plants are dying, it would be best for you to find a way to protect them from dogs.