Walnut Glen Colorado Spruce
Picea pungens ‘Walnut Glen‘
Other Names:Â Goldie Colorado Spruce (previous name)
Plant Details
USDA Plant Hardiness Zones: 3a-8b in cool-summer climates; 3a-7b in hot summer climates  Find Your Zone
Plant Type:Â Coniferous Evergreen Tree
Height at Maturity:Â 10-12′
Width at Maturity:Â 7-8′ at its base
Spacing:Â Best as specimen, or 2 to frame an entrance, or in spaced groupings 10’+ apart for space between trees
Growth Habit / Form:Â Upright, Pyramidal
Growth Rate:Â Slow to Moderate; 5-7 inches per year
Foliage Color:Â Glowing Soft Yellow in spring, transitioning to Powder Blue with Golden frosting through the rest of the year
Fragrant Foliage:Â Yes
Sun Needs:Â Full Sun or Mostly Sun in Zones 3-7 in cool summer climates; Will appreciate filtered sun or shade during the midafternoon hours when the sunlight is most intense in hot summer climates.
Water Needs:Â Â Average, low when established
Soil Type:Â Â Clay (amend heavy clay if needed to ensure good drainage), Loam, Sandy, SiltÂ
Soil Drainage:Â Moist to Damp But Well Drained
Soil pH:Â 6.0 – 7.5
Maintenance / Care:Â Very Low
Attracts:Â Visual Attention
Resistances: Cold (-40°F), Deer, Disease, Drought (when established), Heat, Insect
Description
‘Walnut Glen’ is a unique version of our native Colorado Spruce with foliage color like no other, at least not that we’ve seen. In spring, the new growth emerges with a glowing, soft golden yellow color and then transitions to powder blue while retaining golden frosting throughout the rest of the year. A compact, broadly pyramidal form, it might reach 10 to 12 feet in height and 7 to 8 feet wide or more at maturity. More compact than other golden selections, it forms a dense pyramid 10 to 12 feet in height and maybe 6 to 7 feet wide at the base when all grown up. It is a lovely accent tree in smaller landscape spaces, home foundation plantings, and rock or conifer gardens, and is the perfect size for decorating as a Christmas tree during the holiday season. It thrives in USDA Zones 3a-8b in cool or mild summer climates, and Zones 3a-7b in hot summer climates.
Landscape & Garden Uses
Growing 10 to 12 feet tall and 7 to 8 feet wide at maturity, the Walnut Glen Colorado Spruce is an ideal choice for use as an accent tree in sunny landscape borders, rock or conifer gardens, or home foundation plantings. Two can be used to frame an entrance. Spaced groupings are very nice where space allows. It can also be grown in large pots, planters, and other containers. It is a fine addition to conifer gardens, rock gardens, yellow or blue theme gardens, alpine gardens, and Asian gardens.
Suggested Spacing:Â Best as a specimen or in spaced groupings with trees 10 feet or more apart
Growing Preferences
Walnut Glen Colorado Spruce is easy to grow in a damp to moist but well-drained soil of average fertility. Constantly soggy or wet soils can be problematic, leading to root rot or other harmful plant diseases. So make sure to plant this one in well-drained soil, whether in the ground or in pots. It grows best in full sun, but will appreciate some filtered sun or shade during the afternoon hours when the sun is most intense in hot summer climates of Zones 7-8. We suggest at least 6 hours of direct sunlight per day for the brightest foliage color. Once established, water needs are lower when growing in the ground. In pots, soil moisture will need to be monitored more closely, especially during summer. When the top two inches of soil are dry, provide water.
Note:Â Â Find helpful advice from our experts under the Planting & Care tab above on desktop monitors or below on mobile devices.
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