Is Azalea Toxic to Cats and Dogs?
Azaleas are toxic to cats, dogs, and horses. These common garden shrubs are part of the Rhododendron genus and the Ericaceae family. All parts of the plant, including the leaves, stems, and flowers, contain a compound called grayanotoxin. If a pet ingests even a small amount of the plant, it can lead to significant health problems.
Pet owners should understand the risks of having azaleas in a home or yard. The plant is also known by the common names Rosebay and Rhododendron.
Azalea: what the ASPCA database lists
| ASPCA entry | Azalea |
|---|---|
| Other common names | Rosebay, Rhododendron |
| Scientific name | Rhododendron spp |
| Family | Ericaceae |
| Toxic to | Toxic to Dogs, Toxic to Cats, Toxic to Horses |
| Non-toxic to | None listed |
| Toxic principles | Grayantoxin |
| Clinical signs listed | Vomiting (not in horses), diarrhea, weakness, cardiac failure |
What the ASPCA says about azalea
The American Society for the Prevention of Cruelty to Animals (ASPCA) lists azalea (Rhododendron spp) as toxic to cats, dogs, and horses. The toxic principle responsible for its effects is identified as grayanotoxin. According to the ASPCA, clinical signs of ingestion in pets can include vomiting, diarrhea, and weakness. The most severe signs can involve cardiac failure. The ASPCA also specifies that vomiting is not a clinical sign observed in horses.
What this means for a home with pets
Having azaleas in an area accessible to pets poses a serious safety risk. All parts of the plant are considered poisonous, so a curious dog or cat that chews on a leaf or flower could be affected. The grayanotoxins in the plant are responsible for the gastrointestinal and cardiac signs listed by the ASPCA.
The severity of the reaction can depend on how much the pet eats, but pet owners should treat any ingestion as a potential emergency. Due to the risk of serious issues like cardiac failure, this plant is a poor choice for households with pets that tend to chew on or eat plants.
Keeping cats, dogs, and this plant apart
The most effective way to prevent azalea poisoning is to avoid having the plant in your home or garden. If azaleas are already present, they should be made inaccessible to your pets. For outdoor plants, this may require secure fencing. Indoor plants should be kept in a room that your pets cannot enter.
- Always supervise pets when they are in a yard or area with azaleas.
- Promptly clean up and dispose of any fallen leaves, flowers, or trimmings from the plant.
- When purchasing new plants for your home or garden, always read the label to check if they belong to the Rhododendron genus.
- If you are unsure about a plant’s identity, it is safest to keep it away from your pets.
When to call your vet
If your pet chewed or ate part of this plant, call your veterinarian or an animal poison control line. Note which plant and which part, how much may be gone and when, and take a photo or a piece of the plant with you.
If you know or suspect your cat or dog has eaten any part of an azalea, contact your veterinarian or the ASPCA Animal Poison Control Center immediately. Do not wait for symptoms to appear. Be prepared to tell them what your pet ate, how much, and when it happened. Keep any plant packaging if you have it.
Emergency signs: go now
- Collapse, fainting or severe weakness
- Seizures, tremors or trouble standing
- Trouble breathing or blue, gray or very pale gums
- Repeated vomiting or retching, or a swollen, painful belly
- Any known contact with a substance listed as toxic, even before signs appear
Book an appointment soon
- Vomiting or diarrhea that lasts or keeps coming back
- Not eating or drinking, or drinking much more than usual
- Drooling, pawing at the mouth or a swollen face
- Lethargy, hiding or acting unlike themselves
ASPCA Animal Poison Control Center: (888) 426-4435 (a consultation fee may apply). Your own vet or nearest emergency clinic is always a good first call.
Sources
Last checked October 21, 2026. Listings and guidance can change; your veterinarian knows your pet’s health history.