Dwarf Colorado Blue Spruce Super Blue A dwarf blue spruce with a beautiful silvery-blue colour, Picea pungens Super Blue is a small, very slow-growing, evergreen tree, with a dense, strongly pyramidal habit and stiff branches. The long, thick needles are a striking silvery-blue. Colorado blue spruce Super Blue is easy to grow, needing little or no pruning. It can be grown in a mixed border, but is probably best as a small specimen on a corner. Ideal for the smaller garden. Site: Tolerates some exposureSoil: Fertile, neutral to acidic, moist but well-drained soilPosition: Full sun or light shadeSeason of interest: All yearHardiness: Fully hardyHeight: 16’ (5m) Spread: 6’6” (2m) in 25 years Photos by Nova and Opioła Jerzy, cropped, and licensed under CC BY 2.5.