I'm guessing our idea of clones is different. A clone to me is a freshly rooted cutting. So if you put a clone in a 7 gallon pot it shouldn't be root bound in that time frame. It sounds like you have plants that someone else started outside I hope. Or you might not achieve full flower development. Unfortunately I think you're kind fucked. Being in Maine the on set of flowering should have begun by now. Transplanting now will shock the plant and disrupt growth.
Yeah if theyre flowering I wouldnt transplant but if they arent flowering you gotta either go inside or say goodbye to them because they wont be ready for mid october unless they've got a 7 week flowering period or less and even then it might not work out because your night temps will probably drop a lot before its constantly cold.
