Pet safety
Is Common Water Starworttoxic to cats & dogs?
Callitriche stagnalis
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 Callitriche stagnalis
Is common water starwort safe for cats and dogs?
Not entirely — common water starwort is mildly toxic to cats and dogs. It rarely causes serious harm, but chewing it triggers real discomfort, so keep it out of a pet's reach. 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. Callitriche stagnalis is not listed on the ASPCA Toxic and Non-Toxic Plant database and no toxic principles have been identified for this species. As pet-safe status cannot be confirmed by ASPCA, it is classified as mildly toxic as a precaution; aquatic access by pets is generally low, but consult a vet if ingestion occurs.
| Pet | Toxic? | Per ASPCA |
|---|---|---|
| Cats | Yes (mild) | Mildly toxic to pets |
| Dogs | Yes (mild) | Mildly toxic to pets |
What happens if a pet eats common water starwort?
Callitriche stagnalis is not listed on the ASPCA Toxic and Non-Toxic Plant database and no toxic principles have been identified for this species. As pet-safe status cannot be confirmed by ASPCA, it is classified as mildly toxic as a precaution; aquatic access by pets is generally low, but consult a vet if ingestion occurs. 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 common water starwort, treat it as a suspected ingestion and act on the steps below.
What to do if your pet ate common water starwort
- Remove any plant material from your pet's mouth and move common water starwort 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 common water starwort 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 common water starwort
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)
Common Water Starwort and pets — frequently asked questions
Is common water starwort toxic to cats?
Common Water Starwort (Callitriche stagnalis) is mildly toxic to cats according to the ASPCA. Callitriche stagnalis is not listed on the ASPCA Toxic and Non-Toxic Plant database and no toxic principles have been identified for this species. As pet-safe status cannot be confirmed by ASPCA, it is classified as mildly toxic as a precaution; aquatic access by pets is generally low, but consult a vet if ingestion occurs. 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 common water starwort toxic to dogs?
Per the ASPCA, Common Water Starwort (Callitriche stagnalis) is mildly toxic to dogs. Dogs often chew more enthusiastically than cats, so a toxic plant like common water starwort is best removed from the floor and low shelves entirely.
What happens if my pet eats common water starwort?
Callitriche stagnalis is not listed on the ASPCA Toxic and Non-Toxic Plant database and no toxic principles have been identified for this species. As pet-safe status cannot be confirmed by ASPCA, it is classified as mildly toxic as a precaution; aquatic access by pets is generally low, but consult a vet if ingestion occurs. 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 common water starwort, treat it as a suspected ingestion and act on the steps below.
What should I do if my cat or dog ate common water starwort?
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 common water starwort to the appointment helps the vet treat it correctly.
What are pet-safe alternatives to common water starwort?
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 common water starwort care
Pet-safety is one piece of the picture. For light, watering, soil, and troubleshooting, see the complete common water starwort care guide, or browse the full pet-safe plant library to check another plant before you buy it.