Are all hibiscus plants edible/can be used for tea?
I am trying to find this out as I am wanting to do an experience to that needs hibisus flowers or leaves and while I have two plants I have no idea which hibiscus they are and I am having a hard time locating any useful info on which ones are edible so I can order one for my herb garden.
Thanks for any help you can give

Hibiscus sabdariffa or Roselle is the one used for medicinal purposes like lowering blood pressure.
Roselle (Hibiscus sabdariffa)
I truly don't know if all Hibiscus will be beneficial.

Thanks pod. A friend says she has some Roselle seeds and will send them.
I am still interested in learning if any others are useful