You should be able to find plenty of magnolia leaves in NC...that may help you decide. Others (sea grape, live oak) you will have to buy unless you take a trip to the coast. I use mostly mag leaves because they are the best local choice. They last a really long time in the viv and are big enough to offer shelter, even to larger species/morphs. I have a bunch of live oak leaves that I collected that I mix in with the mag leaves just because I like the way they look. So yeah, finding a clean mag tree locally will be your best bet if you don't want to buy leaves.