Why are blue spruces blue?
Hereof, how do you keep blue spruce blue?
Apply a chelated iron-rich fertilizer if a blue spruce develops a yellow or yellow-green color. A shortage of iron will cause the needles of a blue spruce to lose their blue coloration. The fertilizer will replace the depleted iron and help the needles regain their blue color.
Similarly, where are blue spruces found? The native range of blue spruce is the central and southern Rocky Mountains of the USA – in Idaho, Wyoming, Utah, Colorado, New Mexico and Arizona. For current distribution, please consult the Plant Profile page for this species on the PLANTS Web site.
Furthermore, what is the bluest blue spruce?
Picea pungens 'Hoopsii' Outstanding evergreen tree, generally considered the bluest form. New growth is especially bright blue. Pyramidal form that holds stiff horizontal branches with dense silvery-blue needles.
What is killing the blue spruce?
Cytospora Canker of Spruce The Cytospora canker fungus may attack many different species of hardwood trees, conifers, and shrubs. Over time, the fungus encircles or girdles branches, causing death. Brown needles can be observed on killed branches, but they eventually fall off, leaving bare branches.