Species Colorado spruce
yellow-green foliage with brown-beige fruits on brown branches

Colorado spruce

Picea pungens 'Walnut Glen'

The Colorado Spruce (Picea pungens 'Walnut Glen') is a popular spruce species native to parts of the western United States and Canada. It's an evergreen tree with a pyramidal shape, reaching up to 50 feet tall with an 8-foot spread. Its needles are bright blue-green and are shorter and stiffer than other spruces. It's also tolerant to a variety of soil conditions, including slow drainage, drought and extreme temperatures. 'Walnut Glen' is a slow-growing cultivar that's prized for its hardiness and beautiful conical shape in the landscape. It's perfect for framing landscapes and is a great choice for windbreaks and screens.

Cycle:

Perennial

Watering:

Average

Propagation:

Cutting,Grafting Propagation,Layering Propagation,Air Layering Propagation,Tissue Culture

Hardiness Zone:

3 - 7

Flowers:

Non-flowering Flowers

Sun:

Full sun,part shade

Cones:

Yes

Leaf:

Yes

Leaf Color:

green

Growth Rate:

Low

Maintenance:

Low

Drought Tolerant:

Yes

Salt Tolerant:

Yes

Care Level:

Moderate

watering

Colorado spruce (Picea pungens 'Walnut Glen') should be watered deeply but infrequently. In the spring and summer, the plant should be watered deeply about once per week, allowing the soil to dry about 2 inches deep between waterings. During the winter, waterings should be cut back to about once every 2 weeks, making sure the soil is still getting enough moisture to stay healthy. It is important to water at the root level, and not to over-water by allowing the soil to become soggy. In addition to regular waterings, it is recommended to add a 3-inch layer of mulch around the base of the tree. This will help conserve moisture and keep the soil cool in the summer months.

sunlight

Colorado spruce, also known as Picea pungens 'Walnut Glen', grows best in full sun and requires 6-8 hours of direct, unobstructed sunlight each day. It prefers partial shade in the summer and full sun in the winter. Colorado spruce can tolerate partial shade so it can be grown in areas of the garden which receive dappled or partial shade throughout the day. When planted in an area where the sun’s rays are more filtered, additional sunlight should be supplied with artificial lighting. Sunlight should be directed onto the foliage around mid-morning and last up until mid-afternoon.

pruning

Colorado Spruce (Picea pungens 'Walnut Glen') should be pruned in late spring or early summer after it has finished blooming. Prune small branches and trim larger ones to maintain desired shape. Try to keep the natural shape of the spruce and only remove straight branches or overly long growth. Cut away dead or damaged branches, as well as those that cross or rub against each other, to help maintain an aesthetically pleasing shape. Light pruning is recommended, no more than a third of the total growth should be removed in any given year. Pruning can help to maintain the healthy growth of the spruce, however, it is not necessary for the tree to survive.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Colorado spruce typically start flowering in late spring, usually in May or June.

Starts Flowering

Colorado spruce typically start flowering in late spring, usually in May or June.

Hardiness Map