Mollasses does alot for the grow i personally use about three tablespoons per gallon of water and i have seen a significant change and smell from my buds. Try it out it doesn't hurt the plants just helps them and its all natural.
I thought it was crazy when i first heard about using an orange peel but it works. It keeps your stash fresh, plus it gives it a citrus aroma when lit, pretty nice. The thing is you have to change out the orange peel every day or else you will get mold and no more smoke.