My plum tree has not been pruned for 2 years now, and produced no fruit last year (probably due to a badly timed frost at blossom time), although it kept its leaves. This year there was an abundance of blossoms, but suddenly about two weeks ago the tree seemed to start dying from the trunk outwards. All the blossoms turned brown and dried out/fell off, along with the leaves. Now all I have are a few yellowing leaves at the end of the branches. What have I done? What can I do, and will it die? It's such a shame as I think the variety is 'Early Transparent Gage' and the fruit is delicious.