Is Chestnut 'Colossal' toxic to cats?

No — chestnut 'colossal' is listed by the ASPCA as non-toxic to cats. It is a sensible choice for a home with a cat; a curious nibble will not poison them, though no plant is meant to be eaten. Edible chestnut (Castanea) appears on the ASPCA non-toxic plant lists and is distinct from the toxic horse chestnut (Aesculus). The tree foliage is not poisonous to cats or dogs. However, whole raw nuts pose a choking, gastrointestinal-obstruction and pancreatitis risk to pets, and any moldy nuts should be kept away from animals.

Yes — the ASPCA lists chestnut 'colossal' as non-toxic to cats and dogs. A cat that chews a large amount of any foliage can still get a mild, brief stomach upset, so discourage grazing, but it will not be poisoned.

The ASPCA classification Growli uses applies to both cats and dogs: Chestnut 'Colossal' is non-toxic to dogs as well. See the full chestnut 'colossal' pet-safety guide for both species.

Reliable ASPCA non-toxic picks for a cat home include spider plant, calathea, parlor palm, peperomia, and most true ferns. Browse the best cats-safe plants list to check more before you buy.