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Spruce trees dropping needles is perfectly normal
Older inner needles are dropping as spruce complete a normal multi-year cycle, and healthy branch tips show the trees are not dying.
Area evergreens are experiencing normal seasonal needle shedding, a process that typically occurs from late summer through autumn and is more visible and pronounced this year on many trees.
Because this past summer was hot and dry, area evergreens are undergoing prolific needle cycling; however, healthy green needles at branch tips indicate the trees remain sound.
Although often called 'evergreens,' spruce trees do not hold needles forever; University of Saskatchewan and Colorado State University research shows some species maintain needles for five to seven years, or up to 10.
Interior shading causes older inner needles to cycle out while newer, outer needles remain on branches. This natural shedding accounts for needle layers found on forest floors.
Don Kinzler of NDSU Extension-Cass County notes this seasonal drop is typical for spruce species. Residents with concerns can contact local extension offices for professional guidance on tree health.