I been using botanicare for years but recently decided to change things up with a combo of botanicare,ff big bloom,guano,and earth recharge,with great white myco innoculant..so I can't say for certain that the big bloom is the sole reason,but my partner says that the change has increased our yeild by 20%..I can't honestly say he's right cuz I haven't been able to get to the grow site in 2 weeks(holiday fun)...I do remember a few years ago a friend using big bloom on a white widow grow when he ran out of blastoff..a guy at the store reccomended ff big bloom..there was a noticeable difference in crystal production as well as swollen bracts..that I can vouch for for certain..