Well it's too late for the kick in the but flower cycle nutrient but you should have a good enhancer to provide the proper amount of P & K for this cycle. Awesome Blossoms work well with the GH 3part you are using.

Liquid Karma will help along with the AB but don't forget you will need a flusher for the end. Flora Kleen works well and that is what I recomend to use with AB & GH 3pt nutrients.

There is a chart in the FAQ section you will need to get them through the flower cycle so you know what nutrient mix you need to give them for that weeks cycle of life.

Hope that helps