Is Heartleaf Philodendron safe for cats and dogs?
| Species | Verdict |
|---|---|
| Cats | Toxic |
| Dogs | Toxic |
Severity: Moderate
Read the full first-aid guide: what to do if your pet ate something toxic
The plant on your windowsill tagged 'philodendron' at a US nursery or grocery-store floral section is, more often than not, actually pothos - University of Illinois Extension flags this as one of the most common houseplant mix-ups, noting that many houseplants are referred to as philodendron, but most are probably actually pothos. The two are easy to confuse: both are trailing vines in the arum family with glossy, heart-shaped leaves, distinguished mainly by leaf texture and petiole shape rather than anything obvious on a retail tag.
The good news for a worried pet owner is that the label doesn't change what you do next. ASPCA lists the identical toxic principle - insoluble calcium oxalate crystals - for both heartleaf philodendron and golden pothos, and the symptom lists are nearly the same: oral irritation, drooling, vomiting, and difficulty swallowing as the crystals lodge in the mouth and throat. If your dog or cat chewed a trailing houseplant vine and you're not sure whether it's a philodendron or a pothos, treat it as the same moderate at-home-first-aid situation - rinse the mouth if your pet allows it, and call ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661) if drooling or vomiting doesn't stop quickly.
Facts and examples
- US retail plants tagged 'philodendron' are frequently mislabeled pothos; extension guidance notes 'many houseplants are referred to as philodendron, but most are probably actually pothos', distinguished by leaf texture, petiole shape, and aerial root count. (source, verified 2026-07-26)
- Heartleaf philodendron is toxic to cats/dogs via insoluble calcium oxalates; symptoms include oral irritation, swelling and pain of mouth/tongue/lips, drooling, vomiting, difficulty swallowing - matching golden pothos's toxic principle and symptom set. (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