You get out what you put in. If you are willing to improve the soil, give them some nutrients and cut away vegetation to get them some light then you will get something. Are there 2 plants in each pot? It looks like it. IMO you need to repot them into separate pots with some decent soil, MG organic potting soil will do, or even better I would dig some nice 2x2x2 foot holes and fill the holes with the potting mix and maybe some perlite. The soil has nutrients in it and the big holes will give them room to form some decent roots. Separated, they won't be competing with each other and stangling each other's roots. If this is too much trouble then you're never going to get the results you are looking for. I know that Georgia soil, and it is crap by itself. The pots that you have them in are much too small for one plant, much less two. If you're gonna grow, then grow!