The answer to 'why is my stone walkway dying plants' is that the stone walkway is likely blocking sunlight and drainage, leading to poor soil conditions for the plants. Stone walkways can create a microclimate that is too dry, too hot, or too shaded for many plants to thrive.
Some common symptoms include wilting, yellowing, or stunted growth of the plants along the walkway. Over time, the plants may die off completely if the conditions don't improve.