Q Team:

Read this, these plants should be illegal to grow, trust me I am not just venting here. The entire "Hydrangeas" plant, including the flower buds, is quite toxic to pets and humans. All parts of Hydrangea contain traces of "cyanide". Accidental ingestion could cause shortness of breath, dizziness, fainting, and a rapid pulse. Severe cases of poisoning could also lead to convulsions and death.