Himalayan honeysuckle

This  afternoon we drove to my Mother 's house for a brief stay there. It has been very hot  and humid  (up to 29C ) today. I found  her  Leycesteria formosa  (also known as Himalayan honeysuckle and by lots of other common names) looking very lush, now with  stunning pendulous racemes of  purple  berries in red-purple  bracts. I try to grow this plant  in my garden but it is not happy.It obviously  prefers the moist London clay soil  rather than the  dry, free draining chalk down land, which I try to cultivate.