Two dwarf Alberta spruces have healthy fronts but brown, thinning backs against the house. Holly-tone fertilizer didn’t help.
Cause: combination of limited sunlight and reflected heat from the house siding. The back side receives insufficient light and suffers heat stress.
Action: do not prune the front. Remove dead growth on the back (it won’t regrow). Keep well-watered and fertilized; they can live many years despite the one-sided appearance.
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