After extensive preparations and planing, at the end of December 2011. we have finnaly constructed heating bed in our greenhouse. Our prime intention is to enhance surviving rate of newly collected trees (in November and December 2011), and as general help on tree recover.
Frame is wooden, covered with polyester resin all around, to become waterproof. At the bottom we have put styropor as isolation, then heating cable into pumice.  Over the bed we have tighten wire to and put nylon over the whole bad, to keep moisture and heat.
After 40 days, almost all trees inside have started budding like at the beginning of Spring! This  cold wave and bad weather can be good test for the heating bed.

For the continental part of Croatia snow is normal at this time of the year, but in southern part of county at the Adriatic coast  where we live, 20cm of snow is exceptional event. Last time we had this much snow in 1971. Schools and all public offices are not working. After cleaning main roads, public transportation will start to function again.
Weather forecast for this days were announcing temperatures to -10°C. So few days ago we have put all our trees into greenhouse. So far temperatures are around 0°C.