Blackstrap is supposed to be good. Really any unsulphured Molasses, grandmas is and I use it. Its great for every foodless water during flowering. Some use it for the last couple weeks to flush out nuts. The horticulture stuff is supposedly the same thing only repackaged and more $$$$.
Got really dense thick heavy buds with it, of course I have nothing to compare to, since im only on my 2nd grow and used it on my first and my current.I got 2 1/2 OZ dry on a 2 foot plant of bag seed,under 1 70watt HPS and 6 CFLs. Everyone that tasted it said it was some of the best smoke they had in a while.It looked dam pretty also. Definite ego boost for a first attempt. I dunno if it had to do with the Molasses or if I just have a green thumb. I know that Im gonna use it every time from now on :thumbsup: