All plants › Dogs › Cypress

Is Cypress Toxic to Dogs?

☠️ ToxicSeverity: Mild
✅ Cross-checked against veterinary poison-control guidance · Oct 2026 audit
⚠️ Educational info only. If your pet just chewed something and looks unwell, skip the reading and call your vet or Pet Poison Helpline (US): (855) 764-7661.
Yes, cypress is mildly toxic to dogs. The needles and twigs contain irritant essential oils that upset the stomach when chewed.

Also known as: Italian Cypress, Mediterranean Cypress · Cupressus sempervirens

What makes it toxic

Volatile terpene oils in the foliage and bark, which irritate the mouth and GI tract in modest amounts.

Warning signs to watch for

Drooling, vomiting, mild diarrhea and pawing at the mouth within hours. Most dogs recover within a day with no treatment.

What to do if your dog eats it

Stop the chewing, rinse the mouth and offer water. Call your vet only if vomiting persists beyond a day or the dog seems painful.

Common questions

My puppy chews the cypress branches in the yard — how worried should I be?

Occasional nibbles cause mild upset at most, but repeated chewing adds up. Fence off the tree or redirect the puppy and watch for vomiting.

Are cypress knees and bark toxic too?

The same oils run through the bark and roots, so chewing any woody part can cause similar irritation.

More plants checked for dogs

Pothos☠️ ToxicYes, pothos is toxic to dogs. Chewing any part of the vine releases calcium oxalate crystals thaAloe Vera⚠️ Mildly ToxicAloe vera is mildly to moderately toxic to dogs. The skin and latex layer of the leaf contain coSpider Plant✅ Non-ToxicNo, spider plants are non-toxic to dogs. A dog that nibbles the arching leaves is not at risk ofEaster Lily⚠️ Mildly ToxicEaster lilies are only mildly toxic to dogs — they usually cause stomach upset, not the fatal kiSago Palm☠️ ToxicYes — sago palm is severely toxic to dogs, with a documented fatality rate around 50% when untreBoston Fern✅ Non-ToxicNo, Boston ferns are non-toxic to dogs. Chewing a frond will not poison your dog.

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.