Something in my rose garden is a bit odd: The rose leaves roll up, just as the leaves of a Rhododendron when it gets too dry. My roses have enough soil moisture as it rains quite often. What can it be?
When the leaves of a rose roll up, the rose is afflicted by a wasp called Blennocampa Pusilla. This phenomenon is usually quite rare and shows only a small infestation. Whenever you see this kind of infection, you can just remove the leaves together with the larva in the center of the leaf and destroy them. By the way, the larva itself does not overwinter in the rose but in the soil.