As far as I know, Plum Trees should be pruned in early Spring, before the trees bud out. So that is what I usually do. However, I am wondering about the suckers that grow quite aggressively from the bottom of the tree. Can those suckers be cut off any time of the year? Or should I wait until next Spring and do it as part of the regular pruning cycle? I like to do whatever is best for the tree. - - - Changing gears somewhat, some of you may have read about my attempts to graft plums. I am happy to report that I've had mixed success. Two of the grafts worked, three did not. (But that's better than last year: 0 success.) I don't know what the rootstock is, but I asked around some of my Italian friends (who all seem to have Plum trees) and got a few whips from their yearly pruning activities. So I now have a couple branches of Italian Plums that are supposed to be delicious. I'll put the word out again next Spring, to get some more whips, hopefully different varieties. I've seen a few young trees at the nurseries that have five types of Plum already grafted onto them, for gardeners with not much room, but it's a lot more fun to try this myself.