What are these black spots on
my roses?

This is rose black spot. It is a common leaf disease on roses in the south-east United States, or other hot, humid areas. If left untreated it can defoliate the plant. UT Extension Horticulture Specialist Celeste Scott talks about how rose black spot spreads and how to control it with chlorothalonil.

Related Videos:
Basic Rose Care
Rose Bush Pruning
What is causing the black spots on my rose leaves?

Related Resources:
Disease and Insect Pests
Rose Black Spot