Hardiness: USDA zone
Water use: Moderately low.
Light: Full sun.
Size: 60-100 feet tall and 15-25 feet wide. Dwarf and weeping
cultivars are available.
Plant habit: Evergreen, coniferous, conical tree.
Leaves: Green to blue narrow needles, about 3/4 to 1 inch long,
stiff and densely crowded on the stem. Some may have a white coating.
Attractive all year, but whitish-blue color can be rubbed off by snow,
ice, or fingers.
Cones: The papery cones are 3 to 4 inches long and yellowish in
color.They are usually high in the tree.
Culture: Grows well in a wide range of soil types.
Maintenance: No special maintenance required in the Inland Pacific
Pests/Diseases: Colorado spruce trees may get Cooley spruce gall
aphid, but they are not as susceptible to it as other spruces are. This
insect causes the branch tips to swell and die, and these galls may be
mistaken for small cones. Another insect, the spruce aphid, may be a problem
in warmer areas.
Other: Provides excellent shelter for small birds.
Cultivars: Named cultivars are typically selected for bluer color
or special forms; these will be sold as grafted plants. Unnamed trees
are typically started from seeds, so these will be variable in color and
Water-conserving plant list
Virginia I. Lohr
and Caroline H. Pearson-Mims
Dept. of Hort &
LA, Washington St. Univ.
Page updated: June 8, 2001