Cultivars
Numerous cultivars have been selected for use in parks and gardens. The cultivar P. glauca 'Echiniformis' has gained the Royal Horticultural Society's Award of Garden Merit. A dwarf cultivar, P. glauca var. albertiana 'Conica', is a popular garden plant. It has very slender leaves, like those normally found only on one-year-old seedlings, and very slow growth, typically only 2–10 centimetres (0.79–3.9 in) per year. Older specimens commonly 'revert', developing normal adult foliage and starting to grow much faster; this 'reverted' growth must be pruned if the plant is to be kept dwarf.
Read more about this topic: Picea Glauca