I really like this type of fertilizer for my potted heavy bloomers. Here are pictures of the same two plants, photographed on the same day; the only real difference in their care regime is that the second one received bloom booster regularly after the fist bud was seen. The plant in the first picture wasn't as easily accessible, so it was skipped more often than not. Both of these plants (and any others I use this on) start out getting a balanced fertilizer. It doesn't seem to make any helpful difference if the bloom booster applications are begun before bloom-set. In fact, I think it swings more to the detrimental side of the equation. Plants don't grow as well as they should.
Hope this helps.
