Having lost some good trees to the cold last year, I have made provision to protect my trees this year. Especially the ones that had suffered and had a hard time recovering over the short and miserable summer.
I had a look this morning to see that the protection is adequate and all seemed to be ok.
This first batch of pictures is of the 6'x8' Cold Greenhouse. No heating is provided, but the twin-wall polycarbonate provides good insulation. While temps outside read -6C, the minimum temperature inside was -2C, so perfectly adequate for the hardier indigenous stock, pines and junipers.
The next lot of pictures shows the frost free greenhouse. This is a 8'x12' aluminium and glass construction on a solid slab base. The greenhouse has bubble insulation fitted and is heated by a parrafin heater when required, backed up with an electric fan heater with thermostat to hold temperature above 3C. As an added protection I also cover the trees in this greenhouse with horticultural fleece. This houses cuttings and recently separated air layers, Maples, Tridents, Satsuki and Chinese Elm, as well as some of the trees that were slow to recover after last years winter.
The rest will have to face the winter outside, but may be moved to one or other of the greenhouses if it turns really cold (hope not!)