grass isnt growing because live oak has a dense canopy,want allow sun threw,,i use live oak ,post oak and white oak,have for years,,the important fact is to mulch them up before you put in compost pile bro,,i rack a huge 3ft tall by 50yrd long pile and get my lawnmower out and mow them leaves,,after i mulch um up,i dump out my can after 30 days and mulch again,,that the last mulching,when i wake in the morning and dont have steam coming from pile ,i get out stir the pile,,you got the right idea though,brown leaves for bacteria,green leaves for fungi,,or vice verssa,cant remember im old,lol,,but your mainly trying to provide food for the worms if you dig,,they cant eat the fresh leaf without it being mulched,,here is another tip,,if your want to bring up your worm count,,water your pot bags or whatever till it saturated,,the worms come to top thinking they will drown,when the come to top of soil they breed,thats the only time they breed,in air,,be sure and add some bichar to your mulch pile too for great composting