Is Three-lobed Coneflower toxic to dogs?

Mildly. The ASPCA lists three-lobed coneflower as mildly toxic to dogs — a chewing dog typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. Rudbeckia triloba is not individually listed on the ASPCA toxic or non-toxic plant database for cats, dogs, or horses; a pet-safe classification cannot be confirmed. As with other rudbeckias, sesquiterpene lactones in the leaf hairs and sap may cause contact dermatitis or mild gastrointestinal irritation if ingested. Consult a vet if a pet ingests a significant quantity.

Rudbeckia triloba is not individually listed on the ASPCA toxic or non-toxic plant database for cats, dogs, or horses; a pet-safe classification cannot be confirmed. As with other rudbeckias, sesquiterpene lactones in the leaf hairs and sap may cause contact dermatitis or mild gastrointestinal irritation if ingested. Consult a vet if a pet ingests a significant quantity. 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 dog has had access to three-lobed coneflower.

Stay calm. Remove any plant from your dog'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 in the US, or Animal PoisonLine on 01202 509 000 in the UK 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: Three-lobed Coneflower is mildly toxic to cats as well. See the full three-lobed coneflower pet-safety guide for both species.

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