Hybrid Elm (Ulmus 'Pioneer')

General Plant Information (Edit)
Plant Habit: Tree
Sun Requirements: Full Sun
Water Preferences: Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 7b
Plant Height: 50 to 60 feet
Plant Spread: 40 to 50 feet
Leaves: Deciduous
Flowers: Inconspicuous
Suitable Locations: Street Tree
Uses: Shade Tree
Pollinators: Wind
Miscellaneous: Tolerates poor soil


Photo gallery:

Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Oct 20, 2019 7:27 PM

This is a hybrid between the two European species of elms being Wych Elm (U.glabra) x Field Elm (U. minor). It has large dark green leaves that turn poor yellowish to good yellow in the fall. It has a dense, rounded habit. It was introduced to the nursery trade by Nursery Crops Research Laboratory in Delaware, Ohio in 1984. I have not seen any yet myself. It is resistant to the Dutch Elm Disease and should also be resistant to Elm Phloem Necrosis (Elm Yellows).

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