1. Surround the plants with wire mesh or hang them up to prevent cats from touching them.
2. Spray lemon water on the plants. Cats dislike this smell and will not touch the plants. 
3. When your cat is chewing on plants, stop it immediately and scold it loudly. The cat will then be afraid to eat the plants again.
4. Place a pot of cat grass in your home. Your cat will be attracted to the cat grass and will lose interest in other plants.
5. Interact with your cat more, play with it, and divert its attention; this will reduce the attraction of plants to it.
