Make sure your oak leaves are completely composted. If you can discern parts of leaves in the "final" product, it is not done. Using partially composted leaves is a crap shoot because you don't know how much nitrogen it will eat up to finish composting while it is in your mix. You won't know if you are over or under fertilizing until it's too late. In addition, if the leaves are not full composted, your mix will be constantly shrinking in volume as the season progresses.
