Hi, all! I’m about to have a large oak tree removed and the stump ground. The arborist says the grindings from the tree will be the best mulch I can find. My neighbor says I need to wait a year before applying it to any garden. I’m planning to wheelbarrow it to my back yard for “storage” until I get my raised beds and retaining walls built, then use it in the fall to fill “no-till” beds. What else should I add to be able to plant next spring?