Originally Posted by
USFWC
Most N-P-K fertilizer goes toward tree growth, not acorn production. Foliar applications of zinc can help with production, but thinning does better for the overall productivity of individual trees and the per-acre production. Where are you located, dmese, and are they true Quercus alba white oaks or just in the white oak group?
That is consistent with what I've read as well. Your want more acorns? Add light and take away competition. Fertilizer makes the tree grow, not nuts.