Remember I said it's all about tannin boiling into the fabric which reacts with the iron (II) sulfate? So, we need leaves containing tannin. The most commonly known is oak leaf. Any type will do.
So, this list is just a shortlist of leaves that are succesfull in my dyepot. The leaves do not need to be dry or prepared in any way. Try the leaves from your own garden to see which will work for you! And don't forget to share your finds in the comments!!