Is Comfrey-Leaved Rock Rose toxic to cats?

Mildly. The ASPCA lists comfrey-leaved rock rose as mildly toxic to cats — a chewing cat typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. Cistus symphytifolius is not listed in the ASPCA Toxic and Non-Toxic Plant database and no toxic principles have been identified for this species in published veterinary sources. A precautionary mildly-toxic classification is applied as it is not formally confirmed as non-toxic by ASPCA; ingestion may cause mild gastrointestinal upset.

Cistus symphytifolius is not listed in the ASPCA Toxic and Non-Toxic Plant database and no toxic principles have been identified for this species in published veterinary sources. A precautionary mildly-toxic classification is applied as it is not formally confirmed as non-toxic by ASPCA; ingestion may cause mild gastrointestinal upset. Signs usually appear soon after chewing rather than hours later — watch for drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy after your cat has had access to comfrey-leaved rock rose.

Stay calm. Remove any plant from your cat's mouth and take the plant away. Note how much was eaten and when, and do not induce vomiting unless told to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice; a leaf or photo helps the vet treat it correctly.

The ASPCA classification Growli uses applies to both cats and dogs: Comfrey-Leaved Rock Rose is mildly toxic to dogs as well. See the full comfrey-leaved rock rose pet-safety guide for both species.

For a similar look without the risk, see the best cats-safe plants list — every plant there is ASPCA non-toxic to cats and dogs.