Thats what I use, Brar rabbit backstrap mollases just before going to flower and during as stinky puts it one good glop 1 1/2 Tbls. per gallon. ( excuse the spelling don't have the bottle in front of me)
Note: Did have bad experiance when adding mollasses to early veging plants. Made my ph jump and had to flush out, doing fine now on just water, FF big grow, and Hydrogen peroxide.