I use black strap molassas in my final 4 waterings of flower...sweeten's up that vital growth period, while the plant is putting on weight. Sugar is a great grow additive, but the more unprocessed sugars work the best. I grow in soil, but I'm sure one of our hydro buddies will pipe up soon.
Molasses is HUGE.... molasses... superthrive... and something REALLY overlooked... pineoil... tryin to get some in my area now... but saw a persons grow thas grows exactly like me.. but adde teh pineoil supplement... WOW... smelled like shoepolish but didn't it EVER work...