Fraxinus
pennsylvanica ‘Rugby’
Prairie
Spire® Green Ash
NDSU
Plant Sciences Introduction
Technology: Horticulture
Cultivar (RFM-14)
Fraxinus
pennsylvanica
'Rugby’ Prairie
Spire® Green Ash
Description:
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.
Potential
Uses or Applications:
Nursery
stock, shade, shelter,
boulevard, park, and
specimen tree.
Development
Stage:
Plant material
can be obtained from
NDSU Plant Sciences
Department or designated
nursery subject to
availability.
Patent
Status:
U.S. Trademark
registered – Prairie
Spire®
Licensing
Status:
This cultivar
is available for non-exclusive
licensing.
Dale E. Herman
(701) 231-8477
or
Larry Chaput
Department of
Plant Sciences Loftsgard
Hall - Room 270G
North Dakota
State University
Phone:
(701) 231-8479
Fax:
(701) 231-8474
email:
larry.chaput@ndsu.edu
1735 NDSU Research Park Drive
Fargo, ND 58105-5002
Telephone: 701-231-6659 or
701-231-6681 Fax:
701-231-6661
