I spoke with someone on the phone and they recommended this product before December hit and I applied it and my plants look better than ever. Normally this time of year they are hibernating and turn somewhat pale yellow, but they are vibrant green as if it was spring time. The reason why I posted this is because the people I spoke to on the phone were very helpful and knew alot about plants and because I am also buying three more bags for my apple tree and blue berry trees.