nurtomiBlack spots on rose leaves
Rose black spot can cause dark marks and yellowing.
What to look for
On roses, dark spots with irregular edges may be followed by yellowing and leaf drop. Other rose problems can look similar, so compare several leaves and look for new spots.
What to do
Collect fallen leaves and remove badly affected foliage where practical. Space plants for airflow and water at the base. If the issue continues, use guidance specific to roses before selecting treatment.