Plants / Boxwood / dogs

Is Boxwood toxic to dogs?

Boxwood (Buxus spp.) is toxic to dogs (S1 Caution): the ASPCA lists alkaloids and, for dogs and cats, vomiting and diarrhea. Pet Poison Helpline says the foliage causes gastrointestinal distress.

  • TOXINAlkaloids
  • WHAT TO EXPECTVomiting and diarrhea; Gastrointestinal distress
  • CALL THE VETContact your vet if vomiting or diarrhea persists or worsens after boxwood ingestion.
S0S1S2S3S4

Symptoms

SIGN
Vomiting and diarrhea
Gastrointestinal distress

If your dog just ate it

S1 PROTOCOL
1
Move the boxwood out of your dog's reach. Watch for vomiting or diarrhea. Contact your vet if signs persist or worsen.
2
When to call the vet: Contact your vet if vomiting or diarrhea persists or worsens after boxwood ingestion.
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Care at a glance

Lightdirect
Waterevery 7–14 days
Humiditymedium
Difficulty●●○

FAQ

Is boxwood toxic to dogs?

Yes. Boxwood (Buxus spp.) is S1 Caution. The ASPCA lists "Alkaloids" and, for dogs and cats, "vomiting, diarrhea". Pet Poison Helpline says ingestion of the foliage causes gastrointestinal distress. Move the boxwood out of reach and contact your vet if signs persist or worsen.

Which boxwood does this verdict cover?

Buxus spp. on the ASPCA Boxwood entry. Pet Poison Helpline prints Buxus sp and the alternate names American boxwood, English boxwood, and Japanese boxwood. Both lines are genus-level boxwood. The family on the ASPCA entry is Buxaceae. Check the scientific name on the tag.

Do the horse signs apply to cats and dogs?

No. The ASPCA separates the lines. Dogs and cats: vomiting, diarrhea. Horses: colic, diarrhea, respiratory failure, seizures. Pet Poison Helpline says hoofstock, including horses, are especially vulnerable. The cat and dog grade uses the dog and cat line. Move the plant out of reach and contact your vet if signs persist or worsen.

Is boxwood toxic to cats?

Yes. Boxwood (Buxus spp.) is S1 Caution. The ASPCA lists "Alkaloids" and, for dogs and cats, "vomiting, diarrhea". Pet Poison Helpline says ingestion of the foliage causes gastrointestinal distress. Move the boxwood out of reach and contact your vet if signs persist or worsen.

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Verdapaw Plant × Pet Safety Index, verdapaw.com/plants/boxwood, reviewed 2026-11-04