Full Sun
Easy care
Moderate watering
Frost Hardy
6a
USDA zone
-23°C
Minimum temperature
Expected size
Height | Spread | |
|---|---|---|
12m | Max | 4m |
8m | Min | 2.5m |
50 years to reach maturity
More images of Colorado Spruce 'Koster'
Colorado Spruce 'Koster' Overview
A cultivar of the native spruce to Canada and the USA it is a popular choice for an ornamental tree around the world for it's dense horizontal branches and blue coloured needles as it makes a small to medium sized tree.
Common problems with Colorado Spruce 'Koster'
Can be attacked by spruce budworm, spruce needle minor, spruce beetle and conifer red spider mite. It can also suffer from canker (Cytospora).
How to harvest Colorado Spruce 'Koster'
Needles have been used in traditional medicine by Native Americans to treat colds, settle stomachs and rheumatic pains.
How to propagate Colorado Spruce 'Koster'
Seed
Cuttings
Take softwood or hardwood cuttings.
Other uses of Colorado Spruce 'Koster'
Suits being planted in parks and large gardens. It is also grown for the Christmas tree industry.