Hello there, I am making my first attempt to grow raspberries and tayberries this year and am having some challenges with some of the canes. I've attached some photos below. Long story short, some seem to be doing really well, others not at all. The close up shots are of the problem cane (you can see the successful ones behind - on the left a tayberry on the right a raspberry). It started to sprout but then the leaves withered and it has stopped progressing. Any ideas why and what I can do to save it?