Is Philadelphus microphyllus toxic to cats?

Mildly. The ASPCA lists philadelphus microphyllus 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. Philadelphus microphyllus is not individually listed on the ASPCA Toxic or Non-Toxic Plants database, so its status is unconfirmed; the common name 'mock orange' is also shared by several unrelated poisonous shrubs. Treat with caution and verify with a vet before assuming it is safe for pets.

Philadelphus microphyllus is not individually listed on the ASPCA Toxic or Non-Toxic Plants database, so its status is unconfirmed; the common name 'mock orange' is also shared by several unrelated poisonous shrubs. Treat with caution and verify with a vet before assuming it is safe for pets. 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 philadelphus microphyllus.

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: Philadelphus microphyllus is mildly toxic to dogs as well. See the full philadelphus microphyllus 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.