Before planting your garden, lay chicken wire over the soil. Cats dislike walking on chicken wire and avoid areas with it. To add plants, simply use the wire cutters to cut an appropriately sized hole in the mesh.
Plant flowers or shrubs in your garden that repel cats, such as rue, lavender and pennyroyal. The Coleus canina, called the "scaredy cat plant," is an especially effective repellent.
Repel cats through the use of water. If you catch a cat around your garden, spray it with a water gun or a hose. This encourages cats to stay away from the garden through negative reinforcement. Another option is to install motion-activated sprinklers that blast water at intruders.
If you still have a cat problem, purchase a commercial cat repellent. These products contain predator urine in granular form that repulses cats. Sprinkle the product around the garden to deter pests. These repellents are completely natural and safe for both children and animals.