I give my girls 1 tsp per gallon (half of the recommended dosage) of the Grow Big...but I give that dose twice a week. (Mondays and Thursdays)

I've never needed nor wanted to use the Open Sesame. Nature does this step on her own once you increase the dark period. If you're not careful with the Open Sesame, you will do more harm than good. But since you have the stuff already, sneak-up on a max dosage.
The stuff is strong, so don't over do it...you can kill the ladies if it's overused.
Have you looked at the Fox Farms Weekly Feeding Schedule for soil? Key-in on the use of Grow Big a couple of weeks into flower. Even then, I give 1/2 doses twice a week.

Feeding Schedule:
http://www.foxfarmfertilizer.com/Fox...l-Schedule.pdf