Pet safety
Is Shrubby St John's Worttoxic to cats & dogs?
Hypericum calycinum
Quick verdict — at a glance
- Toxic to cats?
- Yes — toxic
- Toxic to dogs?
- Yes — toxic
- ASPCA classification
- Toxic to pets · botanical name Hypericum calycinum
Is shrubby st john's wort safe for cats and dogs?
Avoid for a pet household. Shrubby St John's Wort is ASPCA-listed toxic to both cats and dogs; even a small chew can drive a vet visit. Plenty of look-alikes on the non-toxic side of the list — see alternatives below. This classification follows the ASPCA Toxic and Non-Toxic Plant List, the most widely used reference for companion-animal plant safety in the US and the standard most UK vets cite as well. The ASPCA lists St. John's Wort (Hypericum) as toxic to cats, dogs and horses; H. calycinum belongs to the same genus. The toxic principle is hypericin, which causes photosensitisation, leading to ulcerative and exudative dermatitis on light-skinned or exposed areas after ingestion. Contact with the flowers can also cause dermatitis.
| Pet | Toxic? | Per ASPCA |
|---|---|---|
| Cats | Yes | Toxic to pets |
| Dogs | Yes | Toxic to pets |
What happens if a pet eats shrubby st john's wort?
The ASPCA lists St. John's Wort (Hypericum) as toxic to cats, dogs and horses; H. calycinum belongs to the same genus. The toxic principle is hypericin, which causes photosensitisation, leading to ulcerative and exudative dermatitis on light-skinned or exposed areas after ingestion. Contact with the flowers can also cause dermatitis. Signs usually appear soon after chewing rather than hours later. If you see drooling, pawing at the mouth, head-shaking, vomiting, loss of appetite, or unusual lethargy after your pet has had access to shrubby st john's wort, treat it as a suspected ingestion and act on the steps below.
What to do if your pet ate shrubby st john's wort
- Remove any plant material from your pet's mouth and move shrubby st john's wort out of reach.
- Note how much was eaten and when, and watch for drooling, vomiting, or lethargy.
- Do not induce vomiting unless a vet or poison-control specialist instructs you to.
- Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice.
- Bring a leaf or photo of shrubby st john's wort to the appointment so it can be treated correctly.
This page is general guidance, not veterinary advice. Pets vary, and a reaction may be to soil, fertiliser, or pesticide rather than the plant. If you are worried, always contact a vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — do not wait for symptoms to worsen.
Pet-safe alternatives to shrubby st john's wort
Want the same look without the risk? These plants are listed as non-toxic to cats and dogs by the ASPCA and have similar care needs:
- Hoya — non-toxic to cats and dogs (care guide)
- Bromeliad — non-toxic to cats and dogs (care guide)
- Christmas cactus — non-toxic to cats and dogs (care guide)
- African violet — non-toxic to cats and dogs (care guide)
Shrubby St John's Wort and pets — frequently asked questions
Is shrubby st john's wort toxic to cats?
Shrubby St John's Wort (Hypericum calycinum) is toxic to cats according to the ASPCA. The ASPCA lists St. John's Wort (Hypericum) as toxic to cats, dogs and horses; H. calycinum belongs to the same genus. The toxic principle is hypericin, which causes photosensitisation, leading to ulcerative and exudative dermatitis on light-skinned or exposed areas after ingestion. Contact with the flowers can also cause dermatitis. Keep it out of reach and contact your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 if your cat chews it.
Is shrubby st john's wort toxic to dogs?
Per the ASPCA, Shrubby St John's Wort (Hypericum calycinum) is toxic to dogs. Dogs often chew more enthusiastically than cats, so a toxic plant like shrubby st john's wort is best removed from the floor and low shelves entirely.
What happens if my pet eats shrubby st john's wort?
The ASPCA lists St. John's Wort (Hypericum) as toxic to cats, dogs and horses; H. calycinum belongs to the same genus. The toxic principle is hypericin, which causes photosensitisation, leading to ulcerative and exudative dermatitis on light-skinned or exposed areas after ingestion. Contact with the flowers can also cause dermatitis. Signs usually appear soon after chewing rather than hours later. If you see drooling, pawing at the mouth, head-shaking, vomiting, loss of appetite, or unusual lethargy after your pet has had access to shrubby st john's wort, treat it as a suspected ingestion and act on the steps below.
What should I do if my cat or dog ate shrubby st john's wort?
Stay calm. Remove any remaining plant material from your pet's mouth and take the plant away so they cannot eat more. Note roughly how much was eaten and when. Do not make your pet vomit unless a vet or poison-control specialist tells you to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 (a consultation fee may apply) and follow their advice. Bringing a photo or a leaf of shrubby st john's wort to the appointment helps the vet treat it correctly.
What are pet-safe alternatives to shrubby st john's wort?
If you want a similar look without the risk, good non-toxic swaps include hoya, bromeliad, christmas cactus, african violet. All of these are listed as non-toxic to cats and dogs by the ASPCA, so they suit a home where pets have access to your plants.
Full shrubby st john's wort care
Pet-safety is one piece of the picture. For light, watering, soil, and troubleshooting, see the complete shrubby st john's wort care guide, or browse the full pet-safe plant library to check another plant before you buy it.