0 Frances B Salisbury, MA on May 06, 2012 Like Clip What's wrong with my flowering purple plum tree? - and what can I do about it now? Like Clip Knarled crusted split branches Like Clip 3 More - in a bigger branch Like Clip The whole tree in it's sunny location - it thrived for about 3 years and now has been declining for all of last year and again this spring. Is it a fungus? Displaying 1 of 13 comments See All Comments Walter Reeves Decatur, GA I think you have a canker disease called black knot. It is common on plums but the bad news is that there is no cure for it other than a sharp pruner. Cutting out all those diseased limbs will make the tree look pretty odd. My advice is to enjoy it while you can and take it out when it becomes too ugly to bear. NOTE: You can drag and drop your photos to reorder them Required Comment Saving...
Cutting out all those diseased limbs will make the tree look pretty odd.
My advice is to enjoy it while you can and take it out when it becomes too ugly to bear.