Is Lonicera periclymenum 'Serotina' toxic to dogs?

Mildly. The ASPCA lists lonicera periclymenum 'serotina' 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. As a Lonicera periclymenum cultivar, it shares the genus's status: not listed as non-toxic by the ASPCA, with berries and foliage containing saponins and cyanogenic compounds that can cause gastrointestinal upset. Treat as mildly toxic, keep pets away from the colourful berries, and verify with a vet if any is eaten.

As a Lonicera periclymenum cultivar, it shares the genus's status: not listed as non-toxic by the ASPCA, with berries and foliage containing saponins and cyanogenic compounds that can cause gastrointestinal upset. Treat as mildly toxic, keep pets away from the colourful berries, and verify with a vet if any is eaten. 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 lonicera periclymenum 'serotina'.

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 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: Lonicera periclymenum 'Serotina' is mildly toxic to cats as well. See the full lonicera periclymenum 'serotina' 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.