What you will see
Red spots on the upper side of leaves, rusty powder underneath; damp conditions and poor airflow.
When to look
Summer – autumnHow to protect
- Prevention
- thin out, airy spot
- collect fallen leaves
- do not overdo nitrogen (soft growth)
- By hand summer – autumnpick off a few infected leaves; collect fallen infected leaves; do not compost infected material after summer and in autumn
- Chemical — only when nothing else helps when presentFungicides are not recommended (they harm biodiversity); if needed: a product authorised in your country against rust
























