Need help

Im a first time grower.now my plants are flowering stage. What i do now. Is this Fertilizer good for flowering

Koolbloom is kinda an additive or bloom booster.
You could get away with using maxibloom the whole time

I used the GH line a lot. The liquid kool bloom is their P and K booster for flower. You still need to run base nutes though unless you're in a high quality soil or something and just want a P&K boost, then it'd be good for that. Careful with it though; there is power to burn your tips in it.