English ivy leaf spot control
Q: After cutting the ivy back all the way and letting it regrow and treating weekly with copper fungicide, the spots show no sign of clearing up Is there anything else I can try?
A: You’re suffering from a bacterial spot. In my experience, they are harder to control than fungal spots. Humidity is a factor…but you can’t control that. Timed sprays with a product that contains copper is the best you can do.
Further details here: Leaf Spots on English Ivy