In bloom is WAAAAAY to late for this stuff.
What you should do is either water with it as soon as your clones hit dirt or (what I do) is to literally dip the clones roots into it and then plant them.
It need to for a relationship directly with the roots ASAP! adding it in flower is too late to see really any good effect from it and you want that stuff active from the get go.
At that price your literally flushing money down the tolet adding it in flower. its also critical that it gets to the roots directly, indirect application through soil will fail alot of the times.
Been using the stuff for about a year and when I transplant I can literally see it covering the root system. On that note Ive found you can source the same exact thing for about 2$ a lb, I wont be spending no 40$ on 8onces anymore thats for sure.