Hi Kukiat! It's so nice to see you here! Marion B. always seems to get black tip every winter so I ended up grafting other cultivars onto the tips that had gone bad so about half the tree is Marion B., and the other half is about six other cultivars. The Marion B. branches are fairly compact in that they don't grow very much before flowering again. This is the first year that Marion B. didn't have black tip for me. It could be because it was a very dry winter.