Landscaping Guide for Colorado Blue Spruce


Plant Reference



May 5, 2023

Landscaping Guide for Colorado Blue Spruce

Introduction to Colorado Blue Spruce

The Colorado Blue Spruce, scientifically known as Picea pungens, is a majestic evergreen tree native to the Rocky Mountain regions of North America. Known for its striking blue-green needles and impressive stature, this tree has become a popular choice for landscaping projects. This guide will provide you with all the information you need to successfully incorporate Colorado Blue Spruce into your landscape.

Characteristics of Colorado Blue Spruce

Colorado blue spruce juvenile

Size and Growth Rate

Colorado Blue Spruce trees can grow up to 50-75 feet tall and 20-30 feet wide at maturity, making them an impressive addition to any landscape. They have a moderate growth rate, typically adding 12-24 inches per year.

Color and Foliage

The needles of the Colorado Blue Spruce range from silver-blue to forest green, giving the tree its characteristic color. The needles are stiff, sharp, and densely arranged, making the tree appear full and lush throughout the year.

Hardiness Zones

Colorado Blue Spruce thrives in USDA Hardiness Zones 2-8, meaning it can tolerate a wide range of temperatures and climates.

Selecting the Right Location for Planting

Colorado baby blue spruce

Sunlight Requirements

For optimal growth and color, plant your Colorado Blue Spruce in a location that receives full sun to partial shade. While the tree can tolerate some shade, too much shade may cause sparse growth and diminished needle color.

Soil Conditions

Colorado Blue Spruce prefers well-draining, slightly acidic soil. However, it is adaptable and can tolerate a variety of soil types, including clay and sandy soils. If your soil is poorly draining, consider amending it with organic matter or planting your tree in a raised bed.

Space Considerations

To accommodate its mature size, be sure to plant your Colorado Blue Spruce at least 20-30 feet away from buildings, power lines, and other trees.

Planting and Caring for Colorado Blue Spruce

Planting Steps

  • Dig a hole twice as wide and slightly shallower than the root ball.
  • Remove any burlap, wire, or string from the root ball.
  • Place the tree in the hole, making sure the top of the root ball is slightly above ground level.
  • Backfill the hole with native soil, gently packing it around the root ball to remove air pockets.
  • Water thoroughly to settle the soil and provide initial moisture.


Colorado Blue Spruce has moderate water needs, especially during the first few years after planting. Water the tree deeply once a week, allowing the soil to dry slightly between waterings. Once established, the tree can tolerate some drought conditions but will benefit from occasional deep watering during dry spells.

Pruning and Shaping

Minimal pruning is needed to maintain the natural shape of a Colorado Blue Spruce. Remove any dead or diseased branches as needed, and trim back any lower branches that may interfere with foot traffic or obstruct views. It's best to prune in late winter or early spring, before new growth begins.

Common Pests and Diseases

Colorado Blue Spruce can be susceptible to several pests and diseases. Some of the most common issues include:

  • Aphids: These small insects can cause needle discoloration and reduced growth. Treat infestations with insecticidal soap or horticultural oil.
  • Spider mites: These tiny pests can cause needle loss and a stippled appearance. Keep the tree well-watered and apply a miticide if necessary.
  • Cytospora canker: This fungal disease can cause branch dieback and overall decline. Prune out infected branches and maintain overall tree health to prevent infection.

Integrating Colorado Blue Spruce into Your Landscape

Two grown colorado blue spruce trees

As a Focal Point

Due to its size and unique color, Colorado Blue Spruce makes an excellent focal point in a landscape. Use it as a centerpiece in a large yard or as an anchor in a mixed planting bed.

Privacy Screens and Windbreaks

The dense foliage and large size of the Colorado Blue Spruce make it ideal for creating privacy screens and windbreaks. Plant a row of trees along your property line or around your outdoor living space to create a natural barrier.

Combining with Other Plants

Colorado Blue Spruce pairs well with a variety of other plants, including deciduous trees, flowering shrubs, and ornamental grasses. Consider planting it alongside other evergreens for an interesting contrast in color and texture.

Fertilizing and Mulching Colorado Blue Spruce


While Colorado Blue Spruce is not a heavy feeder, it can benefit from occasional fertilization to promote healthy growth. Apply a slow-release, balanced fertilizer in the spring, following the manufacturer's recommendations for application rates. Avoid over-fertilizing, as this can lead to excessive growth and increased susceptibility to pests and diseases.


Applying a layer of organic mulch around the base of your Colorado Blue Spruce can help conserve moisture, regulate soil temperature, and suppress weed growth. Use materials such as shredded bark, wood chips, or pine needles, and maintain a depth of 2-4 inches. Keep the mulch a few inches away from the trunk to prevent rot and discourage pests.

Winter Care for Colorado Blue Spruce

While Colorado Blue Spruce is cold-hardy and well-adapted to harsh winter conditions, some care may be necessary to protect your tree from winter damage.

Protect young trees from frost and freeze damage by wrapping them with burlap or frost cloth during the coldest months.

  • Prevent snow and ice from accumulating on branches, as the weight can cause breakage. Gently brush off snow using a broom or your hand, taking care not to damage the branches.
  • If your tree is exposed to harsh winter winds, consider installing a windbreak to reduce the risk of wind damage.

Companion Plants for Colorado Blue Spruce

Creating a well-rounded landscape often involves combining various types of plants that complement one another. Selecting the right companion plants for your Colorado Blue Spruce can enhance the visual appeal of your landscape, improve soil health, and even provide additional benefits such as attracting pollinators or deterring pests. Here are some suggestions for companion plants that work well with Colorado Blue Spruce:

Flowering Shrubs

Flowering shrubs can add color and interest to your landscape while complementing the evergreen foliage of your Colorado Blue Spruce. Consider planting shrubs with contrasting bloom colors or foliage textures, such as:

  • Ninebark (Physocarpus opulifolius): With its arching branches, peeling bark, and clusters of small white or pink flowers, Ninebark provides visual interest throughout the year.
  • Lilac (Syringa vulgaris): Fragrant lilac flowers in spring create a lovely contrast with the blue-green needles of the Colorado Blue Spruce.

Ornamental Grasses

Ornamental grasses can add texture, movement, and a touch of softness to your landscape. Planting grasses with varying heights and colors can create an appealing contrast with the rigid structure of the Colorado Blue Spruce. Some excellent choices include:

  • Blue Oat Grass (Helictotrichon sempervirens): This clumping grass with its striking blue foliage provides a beautiful color echo for the blue needles of the Colorado Blue Spruce.
  • Switchgrass (Panicum virgatum): A native North American grass, switchgrass offers an upright form and airy, cloud-like seed heads that sway gracefully in the wind.
  • Feather Reed Grass (Calamagrostis x acutiflora): With its tall, upright form and feathery seed heads, feather reed grass can add height and visual interest to your landscape.


Groundcovers can help fill in the space around the base of your Colorado Blue Spruce, providing a lush, cohesive look to your landscape. Choose groundcovers that thrive in the same growing conditions as your tree. Some options to consider are:

  • Vinca (Vinca minor): This evergreen groundcover forms a dense carpet of glossy green leaves, studded with small purple flowers in spring.
  • Bearberry (Arctostaphylos uva-ursi): A native groundcover, bearberry features small, leathery leaves and clusters of white or pink flowers in spring, followed by red berries in fall.
  • Creeping Thyme (Thymus serpyllum): This low-growing, fragrant groundcover offers small, purple flowers and can tolerate some foot traffic.

By thoughtfully selecting companion plants that complement your Colorado Blue Spruce, you can create a visually stunning and well-balanced landscape that showcases the beauty of this unique tree.

Arbor Valley Nursery: Your Resource for Colorado Blue Spruce

Arbor Valley Nursery is a reputable nursery specializing in Colorado Blue Spruce trees and other native plants. They offer a wide selection of healthy, high-quality trees, as well as expert advice on planting and care.

Expert Information and Advice

The knowledgeable staff at Arbor Valley Nursery can provide you with all the information you need to successfully grow and maintain your Colorado Blue Spruce. They can assist you in selecting the right tree for your landscape, as well as offering tips on planting, care, and pest management.

Delivery Services

Arbor Valley Nursery offers delivery services for your convenience, ensuring that your Colorado Blue Spruce arrives at your property safely and in optimal condition. Their experienced staff will handle the transportation and unloading of your tree, allowing you to focus on preparing your landscape for its arrival.

Incorporating a Colorado Blue Spruce into your landscape is an excellent way to enhance its beauty and functionality. By following the guidelines in this guide, as well as seeking the advice and services of a trusted nursery like Arbor Valley Nursery, you can enjoy the many benefits this majestic tree has to offer.

The Colorado Blue Spruce is a stunning addition to any landscape, providing year-round color, privacy, and a strong visual presence. By following the guidelines outlined in this guide, you can successfully incorporate this tree into your landscape and enjoy its beauty for years to come.

FAQs About Colorado Blue Spruce

Q: How long does it take for a Colorado Blue Spruce to reach full maturity?

A: It can take between 25-30 years for a Colorado Blue Spruce to reach its full mature size.

Q: Can I plant a Colorado Blue Spruce near my house?

A: Due to its large size, it's recommended to plant the tree at least 20-30 feet away from buildings to prevent potential damage from roots or falling branches.

Q: How can I encourage a more intense blue color in my Colorado Blue Spruce?

A: The Colorado Blue Spruce’s color is decided when it’s still a seed. The color can range anywhere from bright blue to dark green. If you have a strong preference for one versus the other, you may opt for a variety bred for specific colors, or choose one in the nursery with the shade you like.

Q: Do Colorado Blue Spruce trees require a lot of maintenance?

A: Colorado Blue Spruce is a relatively low-maintenance tree, requiring only occasional watering, pruning, and pest management.

Q: Are Colorado Blue Spruce trees deer-resistant?

A: Yes, the sharp needles of the Colorado Blue Spruce generally deter deer from browsing on the tree.