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.'

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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

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