I'm seeking help for a sick aspen tree on my property. When I bought my house 12 years ago, I had a total of 5 aspen trees in my back yard. Three of them have died, so we took them out.
In the past week, all the leaves are developing spots all over.
How and when can I treat this tree? If its possible to save the tree.. I've read about iron deficiencies and several fungus diseases. I'm confused and don't know where to start.
I appreciate any help you can offer to save my tree.
Nothing is more classic to the Rocky Mountain West than aspen trees, but alas, in the landscape they often do not fair well. They typically only have a life expectancy of about 25 years in the home landscape. They are often harvested from the wild with only a limited root system. Also, out of the mountains, they are subject to a lot of stress. Water, heat, insects and diseases all impact aspens. You leaf spots look suspiciously like septoria leaf spot, but only a lab can tell. I am attaching a link to our aspen page which will give you some guidance. The links are for Colorado, but the information will work for the Billings, MT area as well.