Is Golden Japanese Sweet Flag toxic to cats?

Mildly. The ASPCA lists golden japanese sweet flag 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. Acorus gramineus is not individually listed on the ASPCA toxic or non-toxic plant database. Although some growers describe it as low-risk and it lacks the high β-asarone load of A. calamus, it shares the same genus as that toxic species, so it should be treated as uncertain and kept out of reach. Chewing may cause oral irritation or mild GI upset; verify with a vet if a pet ingests it.

Acorus gramineus is not individually listed on the ASPCA toxic or non-toxic plant database. Although some growers describe it as low-risk and it lacks the high β-asarone load of A. calamus, it shares the same genus as that toxic species, so it should be treated as uncertain and kept out of reach. Chewing may cause oral irritation or mild GI upset; verify with a vet if a pet ingests it. 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 golden japanese sweet flag.

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: Golden Japanese Sweet Flag is mildly toxic to dogs as well. See the full golden japanese sweet flag 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.