I have several blue spruce trees in my yard that are approximately 30-40 yrs. old. They are all thinning and the lower branches are dying from the inside out and bottom up. I have included pictures. I’m hoping to save them if possible. I have not seen any pest/ fungus on them. Any info would be appreciated. Thank you,
Blue spruce are beautiful trees, but as their longer name implies (Colorado Blue Spruce), they are not native to our area and rarely last as long as we'd like.
For a time (10-20 years) they look o.k. but are stressed trees in our climate/environment, and that makes them more susceptible to disease and insect problems over time.
See our page here: https://extension.umd.edu/hgic/cytospora-canker-spruce
Here is a blog post about them as well: https://marylandgrows.umd.edu/2018/01/08/whats-wrong-with-my-blue-spruce-tree/
There is not anything you can do at this point.
See this article that helps homeowners decide when to remove a tree: https://extension.umd.edu/hgic/plants/how-do-you-decide-when-remove-tree