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YOU CAN NOT RUSH TIME
Join Date: Sep-2001
Location: Jeffersonville Vt
Country: USA
Posts: 2,154
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Hi, -20C (or -4F) is pretty cold. You say these trees have been outdoors in the ground for a few years. Do we assume you are in the same area now that you were in before? If so and if these trees were able to withstand the conditions you have they can survive, protected, in a box situation. Remember, in the ground they were sheltered a bit from the severe cold. Can you place this box up against the building? This way there will be some heat transfered to the box through the house walls. Not much but enough to moderate the -20C temps you may get.
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A Bonsai student living with his trees at N 44.37 W 77.49...
Think before you act... then think again... no good comes from rushing
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