A bed of Knock Out Roses at Brooklyn Botanic Garden.
As long as you can develop tolerance and not demand total perfection, you can enjoy growing roses without knowing all the solutions to every rose diseases. As we get older, we just don’t have the energy to maintain a perfect disease free rose garden. As you will see in this article, I don’t recommend chemicals. Sanitation in the garden to me is the most important part of my rose gardening practice.
Blackspot is a fungal disease found most often on Hybrid Teas, Floribundas, and Grandfloras. Circular blackspots with feathery edge appear on leaves and stems, often surrounded by yellow patches.
Photo Credit – Missouri Botanic Garden
Control: Mulch right up to the canes to prevent spores from splashing on the rose leaves during heavy rain. Water the roots, but don’t wet the leaves of plants. Pick off infected leaves, remove…
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