I have a pecan tree that I planted from a pecan about 25-30 yrs ago. It's never made any eatable pecans. It forms the

shells and they fall off the tree, but with nothing or nearly nothing in them. I read somewhere that the trees should be fertilized 3 times a year to bear pecans and I've never fertilized it at all. Bad me, for sure! It seems the first time should be in Feb. Since I forgot all about doing that this year to see if I can resuscitate this tree, is it too late to start now? And if it's not, just exactly what do I do? How much fertilizer, what kind, etc.? Do I have to water it after fertilizing? And if I am successful in getting pecans, do they simply fall off the tree or will I have to climb and pick them?
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