Leo in N E Illinois
The Professor
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- USDA Zone
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Zelkova are only hardy thru zone 7, somewhere in zone 6 they meet their cold limit.
Chinese elm is good through zone 5 into zone 4.
Siberian elm is good through zone 3.
American elm, also native rock elm Ulmus thomasii are hardy through zone 4.
I would choose the one I could leave outside all winter. In Idaho that is not a trivial problem. You get serious cold and lots of snow.
Chinese elm is good through zone 5 into zone 4.
Siberian elm is good through zone 3.
American elm, also native rock elm Ulmus thomasii are hardy through zone 4.
I would choose the one I could leave outside all winter. In Idaho that is not a trivial problem. You get serious cold and lots of snow.