Pet safety
Is Large-Leaved Waterleaftoxic to cats & dogs?
Hydrophyllum macrophyllum
Mildly toxic
Quick verdict — at a glance
- Toxic to cats?
- Yes — mildly
- Toxic to dogs?
- Yes — mildly
- ASPCA classification
- Mildly toxic to pets · botanical name Hydrophyllum macrophyllum
Is large-leaved waterleaf safe for cats and dogs?
Mildly. The ASPCA flags large-leaved waterleaf as mildly toxic to cats and dogs — a chewing pet gets oral irritation and drooling rather than a medical emergency, but it is still worth a high shelf. 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. Hydrophyllum macrophyllum is not listed in the ASPCA Toxic and Non-Toxic Plant database. No confirmed toxic principle is documented in horticultural or toxicological sources; the leaves are noted as edible by humans in small quantities when young. Classified mildly-toxic as a precaution given the absence of an explicit ASPCA non-toxic listing; consult a vet if a pet ingests the plant.
| Pet | Toxic? | Per ASPCA |
|---|---|---|
| Cats | Yes (mild) | Mildly toxic to pets |
| Dogs | Yes (mild) | Mildly toxic to pets |
What happens if a pet eats large-leaved waterleaf?
Hydrophyllum macrophyllum is not listed in the ASPCA Toxic and Non-Toxic Plant database. No confirmed toxic principle is documented in horticultural or toxicological sources; the leaves are noted as edible by humans in small quantities when young. Classified mildly-toxic as a precaution given the absence of an explicit ASPCA non-toxic listing; consult a vet if a pet ingests the plant. 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 large-leaved waterleaf, treat it as a suspected ingestion and act on the steps below.
What to do if your pet ate large-leaved waterleaf
- Remove any plant material from your pet's mouth and move large-leaved waterleaf 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 large-leaved waterleaf 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 large-leaved waterleaf
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:
- Basil — non-toxic to cats and dogs (care guide)
- Herb garden — non-toxic to cats and dogs (care guide)
- Rosemary — non-toxic to cats and dogs (care guide)
- Thyme — non-toxic to cats and dogs (care guide)
Large-Leaved Waterleaf and pets — frequently asked questions
Is large-leaved waterleaf toxic to cats?
Large-Leaved Waterleaf (Hydrophyllum macrophyllum) is mildly toxic to cats according to the ASPCA. Hydrophyllum macrophyllum is not listed in the ASPCA Toxic and Non-Toxic Plant database. No confirmed toxic principle is documented in horticultural or toxicological sources; the leaves are noted as edible by humans in small quantities when young. Classified mildly-toxic as a precaution given the absence of an explicit ASPCA non-toxic listing; consult a vet if a pet ingests the plant. 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 large-leaved waterleaf toxic to dogs?
Per the ASPCA, Large-Leaved Waterleaf (Hydrophyllum macrophyllum) is mildly toxic to dogs. Dogs often chew more enthusiastically than cats, so a toxic plant like large-leaved waterleaf is best removed from the floor and low shelves entirely.
What happens if my pet eats large-leaved waterleaf?
Hydrophyllum macrophyllum is not listed in the ASPCA Toxic and Non-Toxic Plant database. No confirmed toxic principle is documented in horticultural or toxicological sources; the leaves are noted as edible by humans in small quantities when young. Classified mildly-toxic as a precaution given the absence of an explicit ASPCA non-toxic listing; consult a vet if a pet ingests the plant. 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 large-leaved waterleaf, treat it as a suspected ingestion and act on the steps below.
What should I do if my cat or dog ate large-leaved waterleaf?
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 large-leaved waterleaf to the appointment helps the vet treat it correctly.
What are pet-safe alternatives to large-leaved waterleaf?
If you want a similar look without the risk, good non-toxic swaps include basil, herb garden, rosemary, thyme. 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 large-leaved waterleaf care
Pet-safety is one piece of the picture. For light, watering, soil, and troubleshooting, see the complete large-leaved waterleaf care guide, or browse the full pet-safe plant library to check another plant before you buy it.