Anonymous wrote:
Anonymous wrote:Hollys are a good option. Be sure to space them appropriately because they will grow wider as well as taller.
Firs are another option, but I have seen a lot of infected fir trees in metro DC. I'm not sure the exact biological name of the cause, but the common name is "rust". Green fir leaves become reddish brown and then the tree dies. So I do not recommend fir trees right now.
Are you sure you aren't seeing the normal life cycle of the dawn redwood? Some trees with fir-style needles are actually deciduous, not evergreen. The green needles of a dawn redwood turn rust colored in fall and drop, then get new needles in Spring.
https://greenwoodgardens.org/fossils/
Cedar rust disease on a cedar or juniper looks like bright orange alien slimes and brown galls. If it kills the tree, the needles turn gray or brown.
Other evergreen diseases:
https://www.burkholderphc.com/symptoms-causes-of-evergreen-tree-diseases/