Pet safety answer · Cited to NC State Extension
Is Croton safe for cats?
Why it's toxic
Toxic principles: Diterpene esters
Clinical signs in cats: TOXIC ONLY IF LARGE QUANTITIES EATEN. SKIN IRRITATION MINOR OR LASTING ONLY FOR A FEW MINUTES. Allergic dermatitis with skin rash developing after repeated contact. Nausea, vomiting, diarrhea when ingested.
Severity rating: mild
Source
Classification per the NC State Plant Toolbox (the ASPCA database has no entry for Croton). Verified 2026-05-28. We update these answers when the source changes the classification.