I am from a farming background, so know little about this - we had a couple of acres of a vege patch's - I am littl erusty, but from what I remember about fertilzing ( we had abundance of all kinds ) . when planting and getting them growing - poultry fertilizers , as they are higher in nitrogen content, then non poultry fertilizers later for better fruits/bushiness.

Too much nitrogen at that stage can screw thing up, production wise.
The plants want to just keep growing, up an up, and puts its energy into that, rather than producing fruits quality.

Hope that helps