I recall some on AFN using Big Bud or equivalent P-K ratio products throughout bloom. For example, many AFM users of Bud Explosion report using it throughout bloom. And I also recall some reporting use of Overdrive or equivalent throughout bloom (and I've done this myself).
I usually switch around among the 2 main P-K ratio products, with one type tending to have similar P and K levels and the other more at 1:2 P-K ratio. I often switch to just Overdrive or equivalent in late bloom when leaves start showing age, turning yellow (with Overdrive having some N in it). I see no deficiencies or excesses of P-K.
But you can't go wrong following manufacturer's recommendations.