Posted: 10/06/2014 at 11:00
Can you tell us more about the plum tree - variety, size and location of pot, feeding and watering regime etc. A photo or two would be good.
To post a pic on here you need to click on the green tree icon on the toolbar at the top of where you type your post, and follow the instructions. Afraid it doesn't work on phones ... yet!
It it doesn't work let us know.