How deep are blue spruce tree roots? According to the U.S. Forest Service, blue spruce trees develop shallow roots after seed germinate, perhaps only 2 to 3 inches deep. This reveals that this tree species grows with a spreading, shallow root system.
What does the root system of a blue spruce look like? Rooting Habit- Young seedlings of blue spruce are shallow rooted, with roots penetrating the soil only about 6.4 cm. Even in mature trees, the root system of blue spruce is relatively shallow, compared to that of Douglas-fir and ponderosa pine, adapting it to the moist site on which it usually grows.