Is Four O’Clock Toxic to Dogs?
Also known as: Marvel of Peru, Beauty of the Night, Mirabilis jalapa · Mirabilis jalapa
What makes it toxic
Irritant alkaloids and proteins concentrated in seeds and roots, with milder levels in flowers and leaves — they inflame the GI tract and skin on contact.
Warning signs to watch for
Vomiting, diarrhea, drooling and reduced appetite within hours; red itchy skin after contact. Seed-heavy meals produce the strongest reactions.
What to do if your dog eats it
Remove plant material, offer water, wash irritated skin, and call your vet if vomiting or diarrhea persists beyond several hours. For a dog that ate a pile of seeds, call the vet right away.
Common questions
My dog eats everything in the flower bed — are four o’clocks a big risk?
A moderate one. They will not usually kill, but a dog that harvests the black seeds will get sick. Deadhead the plants and rake seeds, or replace them in a grazing dog’s yard.
Why is it called four o’clock, and does the timing matter?
The flowers open in late afternoon — the name is about bloom time, not toxicity. The plant is toxic at every hour; the seeds are simply the worst part.
More plants checked for dogs
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.