🌹 Black Spot on Roses – Quick Facts 🌿 👉 One of the most common rose diseases in the UK, caused by a fungus (Diplocarpon rosae). 👉 It thrives in warm, damp weather, especially when leaves stay wet for hours. 👉 First signs: purple or black circular spots with fringed edges on leaves. 👉 Infected leaves often turn yellow and drop early, weakening the plant. 👉 Spores spread easily by rain splash or overhead watering. 👉 Prevent it by pruning for good airflow and avoiding wet foliage. 👉 Remove