Picea pungens (common name is Colorado spruce) is native to the Rocky Mountain of USA, and is the base species for many popular blue spruces in Canada. I used to be fascinated with blue spruces when I first started gardening. I have a few common varieties around here and there in the garden planted more than 20 years ago. In recent years, more attractive newer varieties have become readily available in Canada; largely thanks to Darren of Whistling Gardens.
Picea pungens ‘Gebelle’s Golden Spring’
Picea pungens ‘Glauca Pendula’
I have this for more than 20 years. Unfortunately, I have to move it because of of a renovation project. Although it survived the move, it will likely never recover to its original glory, if at all. I keep it around more for sentimental reason.
Picea pungens ‘Globosa’
This is one of the most common blue spruce in my area since before I started gardening. It is supposed to be a ‘dwarf’ blue spruce, but as A. Broom said, “grafted plants are not reliably dwarf; after a number of years, tend to develop strong leading shoots which, if not cut, will lead to an attractive dense pyramid shape”. My plant has reached more than 2 m, and is more than 20 years old. I only started to prune slightly in the last couple of years to keep the plant in more presentable form.
I did propagated a couple from cuttings more than 12 years ago. They are not particularly dwarf (about 1.2m), but reasonably compact.
Picea pungens ‘Koster’
This is another blue spruce that was planted more than 20 years ago as a specimen plant. So it is likely more than 25 years old. I am not certain of the cultivar identity of this plant.
Picea pungens ‘Maigold’
Picea pungens ‘Montgomery’
I am not sure this is the correct identification. Its name tag was long lost. It is more than 25 years old. It is normally seen as a fairly dwarf blue spruce. However, A. Broom has described this as having a similar late pyramidal habit as ‘Globosa’. Dirr stated that its height would be 6-8 ft.
Picea pungens ‘Spring Blast’
It has creamy white spring growth, but it is still under observation for its characteristics.
Picea pungens ‘Spring Ghost’
This is my most treasured blue spruce; for its creamy white colour shoots in spring. It appears that the unusual early and hot spring las year may have resulted in the spring shoots more cream than white.
Picea pungens ‘Wisconsin Cream’
I like the subtle creamy foliage of this spruce. My plant was not in very good shape when I brought it home. I hope I can get it to recover and show its true colour in a few years.