Cotswolds Garden - FAQs
Frequently asked gardening related questions
Leaf spots on roses can be caused by various fungi, including black spot, downy mildew, or other less common pathogens. Symptoms vary but generally include distinct spots of various colours (black, brown, purple) on leaves. Identify the specific disease by its characteristics (e.g., black spot's yellow halo, downy mildew's fuzzy underside). Treatment involves cultural practices: improve air circulation, avoid overhead watering, remove affected leaves, and choose resistant varieties. Fungicides may be used for severe, persistent cases.