I have a stringy white mold under my compost mulch around trees. I mulch about 3inches deep and water once a week for at least 6 hours with 1 & 2 gal emitters. Most of my trees are only a year and half old and are all sub tropical fruit trees. Everything seems to be doing fine. Is this mold something I should address? It is centered closest to the emitters. Maybe my mulch is too thick and not allowing enough evaporation ? I can't imagine I am over watering trees this young in this heat.