I remember first seeing this species in Florida growing on a live oak (Quercus virginiana) at a rest stop along I-75 as a teenager. This definitely is a native of much of coastal S.E. USA. See BONAP's county level distribution map for the species. The yellow shows the plant as being present...
Just let them grow as is until they gain some size. Be careful not to overheat/overwater them. Don't use fertilizers. Once they are quite crowded, take out a sample and separate them by stirring in water. Make a community pot on new clean compost (your choosing, they are not fussy). I'd...