Is Honesty toxic to cats?

Mildly. The ASPCA lists honesty 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. Lunaria annua belongs to the Brassicaceae family and contains glucosinolates, which can irritate mucous membranes and disrupt thyroid function if ingested in quantity. It is not individually listed on the ASPCA toxic/non-toxic database. Exercise caution around pets that graze on garden plants; ingestion of small amounts is unlikely to cause serious harm but may cause mild gastrointestinal upset.

Lunaria annua belongs to the Brassicaceae family and contains glucosinolates, which can irritate mucous membranes and disrupt thyroid function if ingested in quantity. It is not individually listed on the ASPCA toxic/non-toxic database. Exercise caution around pets that graze on garden plants; ingestion of small amounts is unlikely to cause serious harm but 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 honesty.

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: Honesty is mildly toxic to dogs as well. See the full honesty 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.