Picea pungens Sonia - Blue Spruce

Picea pungens 'Sonia' is a very beautiful dwarf form of the Blue Spruce, rare in cultivation. It first forms an almost spherical ball, then develops over time a delicately rounded cone with compact vegetation. Its foliage maintains a green-blue colour throughout the year. It is composed of very small needles densely arranged in clusters around its short and rigid branches. Its very slow growth and small size make it suitable for planting in rock gardens, as well as in borders or pots on the terrace. It thrives in the sun, in well-drained soil, even occasionally poor or dry.

Originating from the west coast of the United States, and the Rocky Mountains of North America, up to Canada, the Picea pungens, also known as the Colorado Blue Spruce or blue spruce, is a hardy evergreen conifer belonging to the pinaceae family. In its natural environment, it grows slowly and has an elegant conical shape with very regular horizontal branches. This tree can reach a height of 25 to 40 m (82 to 131 ft 2 in) and tolerates limestone soils and some drought.

The 'Sonia' variety, derived from this species, is a recent Polish creation. It is a precious and endearing small conifer, with a compact, round shape when young. After 4 or 5 springs, it grows to form a rounded cone, slightly wider than tall, crowned by a short top. Its growth is slow and regular over the years, around 3 to 6 cm (1.2 to 2.4 in) per year, so that at 15 years old, it reaches about 70 cm (27.6 in) in height, and 90 cm (0 and 35.4 in) in width at the base. It produces short and thick, spread-out branches, covered with very short and sharp needles, arranged in dense and radial brushes. Its young spring shoots are a tender green-blue colour. For the rest of the year, its colour is intermediate between water green and silver-grey. Its scaly, grey-purple bark is quite decorative.
 

The 'Sonia' Blue Spruce, with its attractive foliage, compact growth, low maintenance, and ease of cultivation, is a perfect plant for rock gardens and terraces, or for border planting. It thrives in many situations, under various climates, as long as the soil is well-drained and the exposure is sunny. This plant pairs well with stone walls, geometric lines of swimming pools, and masonry. It can be associated with spring or summer annuals, which will enhance its foliage. The architectural qualities of conifers naturally impose themselves in the design of a contemporary garden, which prefers the aesthetics of forms, silhouettes, and textures to flowers. These plants structurally define a bed, mark pathways and border terraces, replacing the strong presence of trimmed boxwood or holly. They go well with heathers or shrubby salvias, as well as ground cover plants like aubrietas and ceraistes, and flowering shrubs like gauras. The key is to play with volumes and colours.