Posted: 20/09/2013 at 19:10
Theresa, yes, but not now as you risk introducing a disease know as silver leaf which is often fatal to the tree. It's best to avoid pruning altogether if you can but if you must prune, do it when they are in growth in the Spring or Summer, never Autumn or Winter. Restricting growth can be as simple as rubbing-off some buds at the right time. If you need to remove long branches, you do that in Spring, but doing that will promote rapid new growth so you then prune this new growth back in the Summer.
Read through the RHS plum pruning advice below and see what best fits for your tree: