Prairie Spire® Green Ash -- Fraxinus pennsylvanica ‘Rugby’ (RFM-14)


Male seedless green ash cultivar with an above average growth rate of 1.84 feet annually over a ten-year period. Foliage is glossy and bright green. Characterized by a striking, narrowly erect, excurrent growth habit with terminal dominance and dense lateral branches, becoming narrowly pyramidal-elliptical with age. Hardy in USDA Zone 2b. It will reach a semi-mature height of 35 to 40 feet in 25 to 30 years. This tailored, dense excurrent green ash is a preferred cultivar in the commercial nursery trade of the north-central U.S. and prairie provinces in Canada.

prairie spire

Potential Uses or Applications

Nursery stock, shade, shelter, boulevard, park, and specimen tree

Development Stage

Plant material can be obtained from a licensed nursery subject to availability.

Patent Status

U.S. Trademark registered – Prairie Spire®
Canadian Trademark registered

Licensing Status

This cultivar is available for non-exclusive licensing.

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