Abies concolor 'Olson' / Olson White fir

Abies concolor 'Olson' is a tight, compact selection of White fir with light Blue needles that are shorter than those typical of the species. After 10 years a mature specimen will measure 14 inches (35 cm) tall and somewhat wider, suggesting an annual rate of growth of barely 1 inch (2.5 cm).

This cultivar originated as a witch's broom found 2001 by Justin "Chub" Harper of Moline, Iowa at a private residence in Davenport, Iowa and named for the property owner where it was found. It is occasionally seen listed as Abies concolor 'Olson Broom.'

Abies concolor 'Olson' at Bickelhaupt Arboretum, Clinton, Iowa.
Photo by Dax Herbst
Abies concolor 'Olson' — a closeup of foliage detail.
Photo by Bill Barger
Abies concolor 'Olson' — a collector posing with the original broom, freshly harvested.
Photo by Dax Herbst
Abies concolor 'Olson' — an historic photo of the original broom (bottom right side of the tree).
Photo by Dax Herbst