I m testing Hesi's pk 13/14 now and should be pretty much the same. Bottles just arrived today.
Using it on both 5th week and 4rd week of flowering plants. All 8 to 10 weekers.
My base nute is Osmocote 15-9-12 on Coco.(this is what I can get) It's my 3rd Osmocote run and I've had amazing results regarding yield and potency with it. After 2 years with liquidified -and- expensive nutes, 3 ounce plants was just a dream for me .
I'll be posting the results when the ladies are done. If anyone cares or not