Alasdair

You'll probably find late february, march and early april the most dificult for your tree. It starts to get warmer and your tree will start to leaf out and do its spring thing, but a late frost will damage all the new growth and buds. At that time of year keep an eye on the weather forecasts and shelter your elm if it we have a late frost. I bring mine just inside my back door where it stays realativly nippy, but doesn't freeze. Then i put it back out in the sun through the day and it seems to do just fine.

Al

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I can feel another "I wish that was my tree" moment coming on...
Currently studying BSc Plant Biology at the Universty of Wales, Aberystwyth