Prevent digging. Deter your cat from digging in large potted plants by placing inflated balloons on top of the soil. After popping a few balloons with its claws, the cat won’t be tempted to return. Or cut pieces of bubble wrap to cover the soil, leaving slits for water to get through.
Yet another tactic: Sprinkle rough gravel on the soil surface.
Toxic foliage. If your cat or dog is an inveterate leaf chewer, don’t keep chrysanthemums, ivies, or philodendrons in the house.