if i put plants on branches/walls in a tank, how can i fertilize them?

im working on a bioactive crested gecko enclosure, and i want to have plants everywhere. i understand that chemical fertilizers likely arent safe, but i dont know how the poop and/or cleanup crew can effectively keep higher plants fertilized. are there reptile safe fertilizers? is this even something to worry about? im including some inspo pics so hopefully what im trying to describe comes across better