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AGM plants have been through a rigourous trial and assessment programme. They are:
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Other common names
Colorado spruce 'Koster'
Picea kosteri 'Glauca' Picea pungens 'Koster Compacta'
Picea are evergreen trees with rigid, needle-like leaves arranged singly all round the shoots, and narrow, leathery-scaled cones borne near the ends of the shoots
Pinaceae / Pinaceae
'Koster' is an evergreen conifer making a medium-sized tree of neat, conical habit, with prickly, vivid silvery-blue foliage
Aspect South-facing or North-facing or West-facing or East-facing
Exposure Exposed or Sheltered
MoistureMoist but well-drained
SoilLoam, Clay, Sand
Grow in moist but well-drained acidic soil. Shelter from cold drying winds
Propagate by grafting or semi-hardwood cuttings
Suggested planting locations and garden types
No pruning required
May be attacked by adelgids, aphids and conifer red spider mite
Generally disease free
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