Hi Michael,

This is an old one. You said:

Two years ago I almost lost a 50-year old Ulmus davidiana to an 8+
week freeze. I too thought they were hardy. );-) All trees have a
limit, and we all need to understand the impact of our regional
weather and wintering methods on our trees.

I lost every needle on a Pinus thunbergiana "Mikawa" during the same
freeze. Go figure...

Method Used: cold shed
Alternative Method: White co-poly covered bench; cold garage.

The difference is that co-poly warms the mulch bed by day and slowly
cools at night. The shed remains quite cold.


I couldn't tell whether you were recommending the the co-poly covered
bench or the shed. As you said the co-poly would warm the mulch during
the day but the shed or garage would provide some insulation from the
cold ground.

Thanks,
Steve

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