If you are a cat parent, you should be well-informed about the poisonous plants for your furry friend. While this is not an exhaustive list, given below are four plants that are fatal to cats. Make sure you do not grow or bring any of these plants into your home for the safety and good health of your cats.

Oleander

• Oleander is an outdoor shrub or a small tree that has very pretty pink, rose, white, or yellow color flowers.
• Even in small doses, all parts of this plant are extremely dangerous for your cat and can kill him.
• Believe it or not, the water in which this plant is kept in is also poisonous to cats.
• Symptoms of oleander poising include abdominal upset and digestive problems, gastrointestinal tract irritation, vomiting, and diarrhea, excessive drooling, lack of coordination, depression, hypothermia, or sudden fall in body temperature, tremors, seizures, and irregular heartbeat.
• The cardiac glycoside toxins in this plant trigger adverse effects on the heart muscle and cause heart abnormalities and death.
• Keep this plant away from your garden and your flower vase too.

Sago Palm

• Sago palm, also called the cardboard palm, is found outdoors in tropical climates and sunny spots inside homes.
• All parts of this green plant are toxic because it contains cycasin, a carcinogenic and neurotoxic glucoside.
• However, it is the nuts/seeds of the plant that are the most poisonous and capable of killing cats.
• Your cat’s liver can be severely damaged by the ingestion of just one or two seeds of the Sago Palm, and other symptoms include bruising, excessive thirst, vomiting, and diarrhea, lethargy, black stools, liver failure, and even quick death.

Lilies

• Lilies of all kinds are toxic to cats, and especially fatal are Tiger, Asiatic, and Easter Lilies. Even if your cat ingests one leaf of this plant, it can be deadly.
• Not just the leaves, also the stem, pollen, and flower of this plant are poisonous for cats. 
• For example, if there are flower bouquets in your home with lilies in it, your cat brushes on it by accident, the pollen falls on his fur, and he grooms himself by licking this part, even this can be virulent for him.
• Some symptoms you can look out for in your pets because of lily poisoning are lack of appetite, and gastrointestinal disturbances with vomiting, diarrhea, dehydration, excessive thirst, and not urinating, lack of coordination while walking, tremor, and severe seizures.
• Bad breath and breathing difficulties ensue along with severe renal tubular necrosis, or kidney failure within the first 72 hours after ingestion.
• If no treatment is immediately provided for the poisoning from lilies, the cat may lose his life. 

Azaleas and Rhododendrons

• Grayanotoxins, a group of closely related neurotoxins found in all parts of the Azaleas, and Rhododendrons, a small flowering shrub or tree, are toxic to cats.
• Even a tiny amount of this plant, when ingested by pet cats, can cause excessive drooling, vomiting, diarrhea, heart arrhythmias, temporary blindness, and weaken the central nervous system resulting in coma and death.