I've been using it for a few months, Ted. I do use it full strength when the weather is warm and alternate feedings with potassium nitrate plus epsom salts (the product is called UltraClean Super plant food from a company called "Food Rising") which I started using last year. As the weather cools off in October I taper back the fert to half strength and space out the feedings to a week apart or more.
Can't really tell you if it's "working" or not just yet. I am seeing some good looking new growth on a lot of plants, though. We had some cool nights well into May this year, so new growth was sort of slow starting up.
