Triple 19,13, and 10 will work fine. I believe it is recommended at 1lbs per dbh. So a 15" diameter tree at breast height would take 15 lbs of fert at drip edge.
I have also read/heard where this approach does not benefit mast production, if anything it just helps the tree grow as a whole.
You may be better off thinning trees around the oaks, so that the oak has less competition. That is what we have been doing the past few years and it seems to help.
Can anyone tell me what fertilizer is best for oak trees? I have several areas that have a good many White Oaks but they don't seem to produce very well. I figured going in and raking the leaves from underneath them and fertilizing them good might help. I know it will make the wildlife use them more.
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