Seen many studies done using KN03 and they always come to the conclusion that its not effective in non tropical locations.
What Simon recommended is good advice.
Also you want to prune at the right time, ideally you want the new growth on your trees to be a few months old before cooler weather and dry season comes around, in winter don't even water your tree ( if its in ground and already established. ) unless you see your tree really needs it bad. you want the tree to be stressed in the winter.
KN03 really works good in the tropics though. I have seen Keitt plantations where one side was sprayed and one area was not ( control plot ). well the sprayed trees were loaded with fruit, the non sprayed trees had only a few fruit, and different trees were at different stages, some trees did not even flower, in the tropics we just do not get the climate triggers like you do in Florida. if we get rain in the winter here, flowering ( if you get any ) is all over the place, this year has been bad over here as we had a wet winter, our drought came very late and has caused a double whammy, as those trees that did flower, have little rain for their developing fruit.
Anyway my advice is don't waste money on KN03 in Fla to use as a flower inducer, if you want to use it as a foliar fertilizer, go ahead but there are better things to spray.
Timing the pruning and watering, and laying off the nitrogen fertilizer in the fall/winter should be enough,
