This continues to be extremely vigorous on the N fence at the back. I have to give it quite a severe trim 2 or 3 times a year. In spite of this, it has flowered better this year than previously. There remain two mysteries: What sort of growth does it flower on? This year’s? Last year’s? I still can’t work it out. The second problem is how do you tell which way a shoot is growing when all you can see is the middle of a stem and it must be cut out? This applies to the clematis montana as well, but not to the rose, thankfully.