I used rose-buddy on my problem roses last year and couldn't believe the difference. Less blackspot,no powdery mildew or rust. It created more photo-synthesis and alot more foliage.The roses came out beautiful and more fragrant than ever before. I poured it (it's a liquid) on the roots and added my normal food and fertilizer. The results were incredible. Hope this helps. http://www.rose-buddy.com