About

Colorado Spruce ‘Koster’

The Colorado spruce, or Picea pungens ‘Koster,’ is a well-known cultivar of the Colorado blue spruce tree. This evergreen conifer is admired for its striking silvery-blue to blue-green needles that provide year-round colour and visual appeal to landscapes.
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The Appearance

A large evergreen conifer with a pyramidal shape and striking blue needles. It produces small, cylindrical cones.


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The Produce

The cones of Picea pungens 'Koster' are small to medium-sized, typically measuring around 2 to 3 inches (5 to 7.5 cm) in length. The cones have a cylindrical shape with slightly curved scales.


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The Flowers

Produces small, reddish flowers in spring, followed by cylindrical cones.


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The Leaves

The Picea pungens ‘Koster’ is characterised by its needle-like leaves, which are typically 1 to 1.5 inches (2.5 to 3.8 cm) in length. The needles are stiff and sharp, arranged in spirals around the branches.


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The Bark

The bark is gray and scaly, becoming more fissured with age.


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The Habitat

Prefers well-drained soils and full sun. Commonly found in gardens and parks.


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The Ecology

Provides habitat and food for various wildlife, including birds and mammals. The dense foliage offers excellent cover.


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The Culture

Valued for its ornamental blue foliage and timber. Often planted in gardens and large landscapes.


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Fun Facts

Colorado Spruce ‘Koster’ is known for its striking blue needles, which add color to landscapes year-round.

Explore Deeper With The Interactive Map

Unleash your inner explorer with our interactive map of the Arboretum. This live map labels the location of every tree in the arboretum, providing detailed information on each one.

Dive into the fascinating stories behind each tree, learn about their origins, characteristics, and unique attributes. The interactive map is your perfect companion for an engaging and educational adventure. Discover the rich tapestry of nature with just a few clicks!

Interactive Map

Arboretum Index