What….what happens when you burn hydrangea?

breelandwalker:

Oh, the plant contains a cyanide compound that’s only released when it’s burned. The smoke is toxic. It can cause anything from dizziness to fainting spells to symptoms of poisoning if you breathe it in.

And that applies to pretty much all the Hydrangea species, so it’s best just to keep them away from your fire spells. Better safe than sorry!

(And yes, that means side-eyeing the articles claiming that Panicled Hydrangea can be safely smoked like cannabis. Spoiler alert: No. Do not do the thing.)