Is Oleander safe for cats and dogs?
| Species | Verdict |
|---|---|
| Cats | Toxic |
| Dogs | Toxic |
Severity: Severe
Read the full first-aid guide: what to do if your pet ate something toxic
Oleander's US risk is largely a landscaping-and-yard-work risk, not a houseplant one. It's a common screening hedge and drought-tolerant shrub in warm, dry climates - Clemson HGIC describes it as ideal for use as a screen or informal hedge thanks to fast growth and heat tolerance, and UC IPM notes it grows in most US climate zones except higher elevations in the Pacific Northwest. For a dog, that means exposure is more likely to come from a walk past a hedge, a mouthful of a fallen leaf, or investigating a pile of yard-work clippings than from anything indoors.
ASPCA lists oleander as severely toxic to dogs, cats and horses: cardiac glycosides cause drooling, abdominal pain, diarrhea, lethargy and potentially fatal heart arrhythmia - even a small amount is a medical emergency. One hazard worth flagging on its own: burning oleander clippings, a common way to dispose of hedge trimmings, releases the same toxins in smoke, which Clemson's factsheet separately warns can cause severe reactions - don't add trimmed oleander to a yard-waste burn pile with pets or people nearby. Any suspected ingestion warrants an immediate call to ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661) and an emergency vet visit.
Facts and examples
- Oleander grows in most US climate zones except higher elevations of the Pacific Northwest; all parts of the plant are poisonous. (source, verified 2026-07-26)
- Oleander is used as a screen or informal hedge due to fast growth and heat tolerance; burning cuttings produces toxic smoke that can cause severe reactions. (source, verified 2026-07-26)
- Oleander toxic principle is cardiac glycosides; symptoms are drooling, abdominal pain, diarrhea, colic, depression, death. (source, verified 2026-07-26)
Verdict re-verified against aspca.org, 2026-07-26 — confirmed unchanged. Source
This page is for general information only and is not veterinary advice, diagnosis, or treatment. If your pet is showing symptoms, or you think they ate or touched something dangerous, contact your veterinarian or a pet poison-control hotline immediately.
Last verified 2026-07-26