Although a little slow to get going, our Clematis Avalanche is displaying the most beautiful flowers. It started flowering in mid April. We are in Edinburgh and the plant is growing in a corner of the garden, facing south. It doesn't get any sun until afternoon but seems happy to get on with it. We had a super-abundance of snow here during the winter and I did think that the plant might not survive, but it did. My Jasmine is also flowering and Edinburgh has some very cold weather. We live at the highest part of Edinburgh with strong winds blowing through the Pentlands.