Chinese Elm, Sub-Tropical to Temperate

newt1

Well I live in Michigan and the only chinese elm that I left outside in my unheated shed died. Since then I leave them out for a few light frosts (need to keep a close eye on the weather) if it is to get below 25F bring it in for that night. Once the tree losses it's leaves then bring it inside and grow under regular flourescent lights, just keep within 2-4 inches of the top of the tree. People often say that trees need a certain amount of dormant time and I find that the trees regulate that by themselves (I have several that have already been cut back twice indoors and one that still has not leafed out; it is still green cambium though). Just my experience.

The exception: cork bark variety that I got from a local nursery; it was already growing in a pot in this zone so I did not worry about it. It is doing fine although I have not reduced the roots. I have another cork bark that is in a bonsai pot and it does fine with the method above.


Newt

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