
Massively over-planted across central Indiana from the 1980s onward and now failing at scale — it is one of the most common "why is my evergreen dying" calls in the state. Purdue explicitly steers homeowners toward Norway or white spruce instead, so the mistake worth heading off is replanting the same species into the same hole after a removal.
Purdue's position is blunt: blue spruce is a poor landscape choice for Indiana, because a Rocky Mountain tree adapted to dry cool air is being asked to live in humid heat on compacted clay. The result is that nearly every mature blue spruce in central Indiana is somewhere along the road to Rhizosphaera needle cast, and the call is almost always "half my tree is bare, can it be saved."