44 CityTREES
retention of this form. The leaves are a classic elm
shape, and New Horizon has a fairly dense canopy.
It may be that the rapid growth will lead to a
reduced wood resilience at maturity; as yet this
has not been reported, but it is a consideration for
planting in high-occupancy areas. We have observed
that New Horizon requires little to no pruning.
In the UK, New Horizon provides leaves well into
the fall with an attractive golden-yellow colour,
which is an unexpected bonus. Trials along our
streets and in parks have not shown any early pest
or disease issues. The cultivar has an upright habit
and can grow in sun or partial shade. It is cold
hardy to RHS Zone H7 (-20°C) and USDA Zone 6b
(-5°F). It can achieve approximately 12 meters (39
feet) in height and 8 meters (26 feet) in width.
Whilst we may never replace the huge and
regal elms lost in the 70s, New Horizon
looks like an effective attempt at restoring a
species largely lost for a generation.
(above) An established young 'New Horizon' elm.
Photo Courtesy J. Frank Schmidt & Son Co.
(below) Brunswick Park Arboretum's young 'New Horizon'
elms in spring, summer, and fall. Photos by Ian McDermott
