Is White mountain heather toxic to cats?

No — white mountain heather 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. Cassiope mertensiana is not listed individually by ASPCA. No toxic principles have been documented for the Cassiope genus. The broader family Ericaceae contains toxic members (Rhododendron, Kalmia), but Cassiope lacks their reported toxins. If a pet ingests this plant, consult a veterinarian as a precaution.

Yes — the ASPCA lists white mountain heather 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: White mountain heather is non-toxic to dogs as well. See the full white mountain heather 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.