i used the product on my last two grows and found that the soution is extremely low in ph so you must use the penetrator( i think its dish soap). if you dont where the dropplets dry it will eat a hole in the leaf. but since ive used it i havent had a single herm. on like thirty plant just two bananas on the lowest branch of one plant. so id say it works and i will countinue to use the product.