Picea mariana 'Nana' is very popular, dwarf, flattened, cushion-shaped selection of black spruce, with uniform layered branching, and dusty, bluish green needles. After 10 years of growth, a mature specimen will measure 15 to 18 inches (38 - 45 cm) tall and 24 inches (60 cm) wide, an annual growth rate of around 2 inches (5 cm).
This conifer is a very old part of the nursery trade, unfortunately of unknown origin. It's apparent first mention was by Ludwig Beissner in his 1884 book, Handbuch der Nadelholzkunde.
