You Aren't Supposed to Eat Hydrangeas?

So I was trying to get Kiyah to smell some hydrangeas that are growing in our yard. She would lean in and get really close then open her mouth really big and shove what she could in. Then I thought I rememberd something about them being poisonous. So we immediately stopped that. This picture is not that great but you get the idea. She loved touching them. She was really gentle and then she would pull her hand away quickly like she was scared of what it might do to her. She LOVES being outside and usually cries when you come back in. We are looking forward to lots of spring days outside! :)