Poinsettia Poisonous to Cats? Mild Irritant, Not Deadly

ASPCA Animal Poison Control lists Poinsettia (Euphorbia pulcherrima) as toxic to cats and dogs. The toxic principle is Irritant sap. Signs reported: Irritating to the mouth and stomach, sometimes causing vomiting, but generally over-rated in toxicity..

The original ASPCA text explicitly states this plant's toxicity is "generally over-rated in toxicity." In practice it causes only mild irritation and is not the highly toxic plant often described online.

If a pet may have eaten a plant, contact a veterinarian, ASPCA Animal Poison Control (888) 426-4435 or Pet Poison Helpline (855) 764-7661. Note what was eaten, how much and when, and bring a photo or a piece of the plant. Do not induce vomiting or give home remedies unless a professional tells you to.

• Aloe Vera
• Azalea
• Chrysanthemum
• Cyclamen

Toxicity lists are by species, and many houseplants look alike. Photograph the whole plant, a leaf close-up and any flower in even light; the app reads the species first, then you can check it here. If the species is uncertain, act as if it were toxic.

Mildly. The ASPCA lists poinsettia (Euphorbia pulcherrima) as toxic to cats, dogs and horses because its irritant sap can upset the mouth and stomach and sometimes cause vomiting, and in the same entry calls it generally over-rated in toxicity. Purdue University's Plant and Pest Diagnostic Lab (2021) says poinsettias are not very toxic to pets and are not harmful unless the leaves and bracts are eaten in very large quantities. The signs it lists are salivation in cats and vomiting if leaves are swallowed.

So a cat that chews a poinsettia will most likely drool or vomit and recover. That is still worth a call to your vet, especially for a kitten, a cat with other health problems, or if you are not sure the plant was a poinsettia.

• The story. Ohio State University says the plant was included in H.R. Arnold's 1944 book Poisonous Plants of Hawaii on a false assumption, and the reputation stuck.
• The rat study. University of Missouri Extension (2019) describes a 1971 Ohio State study that fed rats extraordinarily high doses of different parts of the plant with no toxicity observed.
• The poison-control data. The same Missouri article reports that researchers in the 1990s reviewed almost 23,000 poinsettia ingestion cases reported to poison control centres: more than 92 percent showed no ill effects, and no one died or became critically ill. Purdue cites a 1996 review by the American Association of Poison Control Centers that concluded poinsettia is not toxic but may cause discomfort if eaten.

Those figures are for people. For cats, the ASPCA's mild-irritant listing is the reference to use.

Poinsettia has a milky sap. Purdue advises people who are sensitive to natural latex to avoid contact with it, and Missouri Extension notes the sap shares proteins with natural latex rubber and can cause allergic reactions in some people. University of Minnesota Extension says the sticky white sap can cause a skin rash and recommends gloves. For a cat, sap on the fur can be licked off later, so wipe it off with a damp cloth if a cat has been rubbing against a broken stem.

It is not on the ASPCA's non-toxic list, so it is not pet friendly in the strict sense, but it is one of the least dangerous plants on the toxic list. Purdue's practical advice is to keep it out of reach of cats and puppies, which often chew on newly introduced plants. A high shelf, a closed room, or a table your cat does not climb is enough.

If you want a holiday plant with no toxicity listing at all, the ASPCA lists Christmas cactus as non-toxic; see Christmas cactus and pets.

There is no official ranking, but true lilies are the ones vets treat as an emergency. The ASPCA lists lilies as causing kidney failure in cats, and Iowa State Extension says a cat exposed to an Easter lily needs veterinary care immediately. That is a completely different level of risk from poinsettia. See lilies and cats and the ASPCA-checked list of house plants safe for cats.

Mostly because of cold draughts, soggy soil and the foil wrap they are sold in.

• Temperature. N.C. Cooperative Extension (Clay County, 2025) keeps them at 65 to 75 F by day and away from cold draughts, heating vents and outside doors, because sudden temperature changes make the leaves drop. University of Minnesota Extension says temperatures below 50 F damage the plant and freezing kills it.
• Water. Water when the surface feels dry, thoroughly, then empty the saucer; overwatering is a common reason they decline after the holidays (N.C. Extension). Minnesota says never to let the pot sit in water.
• Foil sleeves. Make holes in the foil or remove it when watering (N.C. Extension, Minnesota), because it traps water around the roots.
• Light. A bright spot near a sunny window but out of direct afternoon sun (N.C. Extension); a south, east or west window (Minnesota).
• Reblooming. The coloured bracts need long nights. N.C. Extension gives about 14 hours of complete darkness each night for 8 to 10 weeks from late September or early October; Minnesota gives 16 hours of darkness and 8 hours of bright light daily from about September 21 for roughly 8 weeks. Any light during the dark period can delay the colour.

The sections above headed how poisonous poinsettia is, where its reputation came from, the sap, pet friendliness, the most toxic plants for cats and why poinsettias are hard to keep alive were added on 2026-09-25. Research and drafting were done with the help of AI, and every figure was checked line by line against the sources listed on this page.