Is Monstera Toxic to Cats and Dogs?
Short answer: yes. Monstera deliciosa — the Swiss cheese plant all over your feed — is toxic to cats and dogs per the ASPCA. It's the same insoluble-calcium-oxalate story as pothos and philodendron: sharp, immediate mouth pain rather than a deadly poison. Here's the real risk level and what to do.
Quick verdict
Toxic? Yes — to cats and dogs (ASPCA-listed).
How bad? Usually mild to moderate. The big fleshy leaves take effort to chew, which often limits how much a pet eats.
Toxic part & why: the whole plant — leaves, stems and the unripe fruit — contains insoluble calcium oxalate crystals.
What is monstera, exactly?
Monstera is Monstera deliciosa (and its smaller cousin Monstera adansonii) — a climbing aroid famous for the holes and splits in its huge leaves. It's frequently mislabelled "split-leaf philodendron," and it's related to both philodendron and pothos — all three share the same toxin, so if you mix them up, the safety answer is the same: keep them away from pets.
- Intense oral burning & pawing at the mouth — the calcium-oxalate crystals cause immediate pain, so pets often paw their face or shake their head
- Drooling — heavy, sudden
- Vomiting and decreased appetite
- Difficulty or pain swallowing
- Swelling of the lips, tongue or mouth — in rare, severe cases this can affect breathing and is an emergency
The pain is usually immediate, which — grim silver lining — means most pets stop chewing quickly and don't eat a large amount.
What to do if your pet ate monstera
- Rinse their mouth gently with water if they'll let you, and wipe away any plant bits. This helps flush the crystals.
- Offer something cold — a little milk, yogurt, or cold water can ease the oral burning.
- Note how much they ate and when.
- Call your vet, or the ASPCA Animal Poison Control Center at (888) 426-4435 (a consultation fee may apply). Say the name: "Monstera deliciosa."
- Do not induce vomiting unless a vet tells you to.
- Go in immediately if you see mouth swelling, trouble breathing, or repeated vomiting.
Monstera, or a lookalike?
Monstera, split-leaf philodendron and young philodendrons get mixed up constantly. Snap a photo and Nature Lenz names the exact species — and flags whether it's pet-toxic. Free, no paywall.
Get the free app →Pet-safe plants to keep instead
You don't have to give up greenery. These are non-toxic to cats and dogs per the ASPCA:
For the full picture, see our cat-safe houseplants verified against the ASPCA and how to identify toxic plants for dogs and cats.
The bottom line
Monstera is toxic but low-drama: the leaves are tough and the pain is instant, so most pets take one bite and leave it. The practical risk is a bored cat or a teething puppy going back to it. Keep it out of reach while young, and if you want a big leafy statement plant that's genuinely pet-safe, look at a parlor palm or areca palm instead.
FAQs
Can monstera kill a cat?
Very unlikely in a healthy cat. Monstera toxicity is usually mild to moderate — oral pain, drooling and vomiting that settle with supportive care. The rare emergency is severe mouth or throat swelling affecting breathing.
Is monstera fruit poisonous to pets?
The ripe fruit is edible for people, but unripe monstera fruit is loaded with the same calcium oxalate crystals as the leaves and will irritate a pet's mouth and gut. Keep any fruiting monstera well out of reach.
Is monstera toxic to dogs too?
Yes. The ASPCA lists Monstera deliciosa as toxic to both cats and dogs, with the same symptoms: oral irritation, drooling, pawing at the mouth, and vomiting.
My cat bit a monstera leaf — should I worry?
Usually not badly — the pain stops most cats fast. Watch for a few hours. If drooling is heavy, the mouth or tongue looks swollen, or vomiting repeats, call your vet or ASPCA Poison Control at (888) 426-4435.
What large plant is safe for cats instead of monstera?
Parlor palm (Chamaedorea elegans) and areca palm are the best big, leafy, non-toxic picks. For a trailing look, spider plant. All are ASPCA non-toxic to cats and dogs.