Originally Posted by PixelatedPaint
The same as indian almond leaves. Some species of oak release darker tannin then others. Also you need to be sure the oak trees you chose from are not trees which have been subject to pesticides.
Oh I see and that would be scary to try and get a leaf from a tree that has had pesticides in it.
How would you go about getting one from a tree that hasn't used pesticides? I would think to try to get some from in town or a park right? Pesticides are mostly on fields and other crops, but not near public areas, right?