Last year I had 5 yards of black dyed mulch put down. The mulch was not good and had a lot of mold and fungus throughout the year. I’ve managed to dig up the mulch that was still down and put it in a large pile near my shed. Is there any faster way to break down this old mulch that just keep watering it?
Try covering it with black plastic so that the sun heats up the pile. Between the moisture and the heat it should break down faster.