Ulmus 'Frontier' – Ulmus 'Frontier'

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Ulmaceae

Ulmus 'Frontier' – Ulmus 'Frontier'

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A medium-size tree with an initially ascending, pyramidal crown and a good upright central leader. Mature trees have an oval crown and grow to a height of 6 to 10 m. The grey-green bark is smooth. The relatively small leaf is oval to elongated-ovate and glossy dark green. In autumn it turns an attractive red to dark wine red. Unlike many other Elms, ‘Frontier’ blossoms in September and not in spring. The tree originated as a hybrid between Ulmus minor and Ulmus parvifolia. The latter is an Asian species that is evergreen in milder climates. Ulmus parvifolia naturally has a very strong resistance to Dutch elm disease. To a certain extent, ‘Frontier’ has inherited this resistance. Its oval crown shape makes it suitable as an avenue tree or street tree.
Availability
Clear stem (3)
Specifications
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Height
6 - 10 m
Width
6-9m
Crown
pyramidal, later oval, half-open crown
Bark and branches
bark grey-green, smooth
Leaf
oval to elongated-ovate, glossy dark green
Autumn colour
red
Flowers
in dense clusters, green, September
Fruits
flat winged nutlets, oval
Spines/thorns
None
Toxicity
usually not toxic to people, (large) pets and livestock
Soil type
fertile, moist and airy, tolerates limy soil
Soil moisture
suitable for wet soil, withstand short flood
Paving
tolerates paving
Winter hardiness zone
5 (-28,8 to -23,4 °C)
Wind resistance
fairly to good
Other resistances
resistant to frost (WH 1 - 6), can withstand wind
Application
avenues and broad streets
Shape
clearstem tree
Origin
U.S. National Arboretum, Washington DC, USA, 1990
Clear stem tree calcareous soil loamy soil nutrient-poor soil peaty soil sandy soil tolerates paving resistant to frost (WH 1 - 6) suitable for wet soil withstand short flood can withstand wind oval 2nd size, between 6 and 12 metres half-open crown green green average growing Attractive autumn colour non-toxic (usually) Tree for the future
Applications and inspiration
Trees with good autumn colours
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Frequently asked questions
Ulmus 'Frontier'

Ulmus 'Frontier' can eventually reach a height of 6 - 10 m, depending on the site and climate conditions.

Ulmus 'Frontier' is average growing and can eventually reach a height of 6 - 10 m, depending on the site and climate conditions.

The leaves of Ulmus 'Frontier' turn red in autumn.

The right time to plant Ulmus 'Frontier' is during the dormancy period. In Western Europe, Ulmus 'Frontier' with root balls can generally be planted from mid-November to late April, although this depends strongly on the climatic conditions and the species of tree.

Ulmus 'Frontier' blooms in september.
General