Black spots on Hybrid tea rose leaves - Ask Extension
Dear expert,
Since sometime in June, my hybrid tea rose started getting black spots on the leaves. I sprayed fungicide a couple of times and stoppe...
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Black spots on Hybrid tea rose leaves #879264
Asked July 29, 2024, 2:47 PM EDT
Dear expert,
Since sometime in June, my hybrid tea rose started getting black spots on the leaves. I sprayed fungicide a couple of times and stopped due to the high temperature. Then because of my negligence/out of town, the leaves fell off a lot. Please see attached pictures. It still grows new leaves and still get black spots on the leaves, but not on the branches. Is there anything I can do at this point and going forward?
Thank you very much!
Betty
Howard County Maryland
Expert Response
Hello; Thanks for submitting your garden and landscaping questions to the University of Maryland Ask Extension Service.
Golly, it has been a tough gardening summer. Please see this University of Maryland Extension webpage on managing problems with Roses: https://extension.umd.edu/resource/rose-identify-and-manage-problems/.
Black spot has long been a problem for roses especially hybrid teas. Fortunately, new and improved roses bred for disease resistance is reshaping the rose industry. Here is another webpage specifically about black spot disease of roses: https://extension.umd.edu/resource/black-spot-disease-roses/.
See the section on "Management Strategies" in the above webpage. Whenever you water roses try not to get foliage wet, but rather aim to water near the ground surface. Rake away any fallen leaves, and if looking for a fungicide to control black spot visit garden centers to speak with a knowledgeable sales associate to advise you on the right product to purchase and how/when to apply it.
I also suggest visiting botanical gardens to speak with a rosarian who takes care of roses in their gardens to learn how they manage common rose issues.
Good luck in your gardening efforts. Thanks; Christopher
Golly, it has been a tough gardening summer. Please see this University of Maryland Extension webpage on managing problems with Roses: https://extension.umd.edu/resource/rose-identify-and-manage-problems/.
Black spot has long been a problem for roses especially hybrid teas. Fortunately, new and improved roses bred for disease resistance is reshaping the rose industry. Here is another webpage specifically about black spot disease of roses: https://extension.umd.edu/resource/black-spot-disease-roses/.
See the section on "Management Strategies" in the above webpage. Whenever you water roses try not to get foliage wet, but rather aim to water near the ground surface. Rake away any fallen leaves, and if looking for a fungicide to control black spot visit garden centers to speak with a knowledgeable sales associate to advise you on the right product to purchase and how/when to apply it.
I also suggest visiting botanical gardens to speak with a rosarian who takes care of roses in their gardens to learn how they manage common rose issues.
Good luck in your gardening efforts. Thanks; Christopher
