About This Plant

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. ‘Koster’ is treasured for its compact and pyramidal growth habit, making it a favoured choice for ornamental planting in gardens and as a decorative accent tree.

The Story


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.


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. They feature a bluish-grey hue, characteristic of the Colorado Blue Spruce variety.
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