It is important to keep toxic plants out of reach of all pets, including Maine Coon cats. Some poisonous plants to cats include lilies, azaleas, sago palms, and tulip bulbs. Ingestion of these plants can cause severe illness or death in cats. If you suspect your Maine Coon has ingested a toxic plant, contact your veterinarian or the ASPCA Animal Poison Control Center immediately. Signs of plant poisoning in cats can include vomiting, diarrhea, difficulty breathing, and tremors. To prevent accidental poisoning, it is a good idea to keep a list of toxic plants in your home and avoid decorating with them.