Is Yarrow Toxic to Dogs?

⚠️ Mildly 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.

Yarrow is mildly toxic to dogs. A dog that grazes on it may vomit or have diarrhea, but severe poisoning is uncommon.

Also known as: Common Yarrow, Achillea millefolium, Soldier’s Woundwort · Achillea millefolium

What makes it toxic

Essential oils, alkaloids and tannins that irritate the gastrointestinal tract when eaten in meaningful amounts.

Warning signs to watch for

Vomiting, diarrhea and mild drooling within hours; some dogs show increased urination after larger meals of the plant.

What to do if your dog eats it

Move the dog away from the plant, offer water and watch. Contact your vet only if symptoms persist beyond a day.

Common questions

Can yarrow salve hurt my dog if he licks it?

A lick of a topical salve is usually harmless, though it may cause mild drooling. Do not encourage licking, and use pet-appropriate products on broken skin.

Is yarrow dangerous to horses in the same pasture?

Horses are more sensitive — repeated grazing causes more significant signs — so keep pasture yarrow controlled for mixed-animal properties.

More plants checked for dogs

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