Picea glauca 'Dent' is quite a handsome variegated large upright selection of White sprucer. The variegation is most prevalent in the spring at bud break but lasts well throughout the growing season. I purchased 4 of these in 2000. Two are about 30% white/cream variegated. One is about 5% variegated and the other has yet to show any variegation. Mine grow about 8 inches (20 cm) per year but I would expect that may increase a bit as the plants get bigger. The tree does not appear to be dense without pruning. Mine have never winter burned in my zone 3.
'Dent' is a medium sized tree with a relatively open growth habit; grows about 10 inches (25 cm) per year; foliage has patches of white scattered randomly throughout, adding a colorful touch to the garden; the variegation is most striking in the spring and suffers little burn in the full sun. (Coenosium Gardens)
This cultivar is a seedling selection made by Greg Williams of Wolcott, Vermont and introduced to the nursery trade by Kate Brook nursery in the early 1980s.