To use this simple yet effective cat repellent, identify the areas of your garden that they seem to frequent the most, then liberally sprinkle the cayenne in those spots.
Cayenne can also be used to deter critters like deer, rabbits, and squirrels, and acts as a mild natural pesticide that deters bugs that can harm your tomato and zucchini plants.
As a natural ingredient, cayenne won’t harm the soil or plants. Reapply it after it rains or when you water your plants since water can dull the scent and make it less effective.