I bought 4 Gertrude Jekyll roses from David Austin a couple of years back. First year they were wonderful, second year they had a severe aphid infestation and pretty bad black spot.
I am keen to keep them as healthy as possible this year, and while I was inspecting the rose new growth earlier I found a few of these weird wrinkled growths - any idea what they are and whether they're something to worry about? The aphids are unfortunately back already, and have been sprayed with Rose Clear today which should help but if this is another problem I would like to know!