I have recently re-joined the HOS after being absent for sev. years. I have recently ordered a Shropshire Damson which I am going to pick up tomorrow.
I successfully grow cherries, quince, figs, currants, gooseberries, and 3 kinds of grapes here .....but today have a question to pose re: planting this bare-root plum . I plan to site it in full sun, but am concerned about the tree
acquiring some sort of fungus disease due to our cold wet winters and spring here __I live in Beaverton. Is there anything I could put INTO the planting hole
to help prevent this disease and other like problems ??

Good drainage helps. I think you are much more likely to get a bacterial disease than a fungal one. Aggressive pruning in dry weather helps a lot too. I live in the Beaverton area and I have a Damson plum. It gets affected by disease, but keeps growing. I spray it with bacterial compost tea.
John S
PDX OR

Plant your Damson plum tree in well drained, loamy soil if possible. Don't worry if your soil isn't ideal; Damson plum trees can grow in a variety of different soils. Make sure the tree gets full sunlight where it is planted to ensure the best possible growth.