Look up common trees in your area to key them. Many nature areas are not often sprayed with pesticides, so I would go there, or ask your neighbours if u can go to one of their trees lol. By half shredded, I just meant you should have a 50:50 ratio of shredded leaves to flake soil. It’s impossible to have too fine of leaves, so try to crush them up as much as you can.Thanks for the help. My beetles are probably arriving this week. I do not have enough time to make flake soil. For the leaves, where should I collect? I don/t know if there are pesticides in my yard or if I have hardwood trees. Also, what do you mean half shredded?