once you start flowering you shouldnt foiliar spray, it could cause mold in the later stages. ive never heard of using molasses in a spray. there is a section in organic gardening by bluebear on molasses (3lbs) or something. any thing ive read says to disolve a tablespoon per gallon but ive been using 2 tablespoons per gal. blackstrap molasses are supposed to be better, but im sure the unsulphered will work fine. and it should be ok to use them untill just before harvest.