I live in the Pacific Northwest. Our neighborhood has several Colorado blue spruces that are doing beautifully, including one in my yard. I am considering putting in a new blue spruce. Is it possible that the new tree could bring in an aphid problem to the neighborhood? We haven't experienced the usual problems with aphid induced needle loss. Also, the tree I am considering is labelled as Picea Pungens Holiday (Backeri Holiday). I haven't been able to find any info on this cultivar. Anyone know if this is truly a dwarf variety? Any info would be appreciated. Thanks in advance.