greengiant
ArboristSite Operative
Not sure if this is relevant, but I remember seeing this Mythbusters episode. The last line is where it connected with the question about whether trees freeze or not.
The website shows the video, but for some reason doesn't show the results-duh, but I found the summary below.
http://www.fancast.com/tv/Mythbusters/11339/1321592974/Mythbusters:-Exploding-Frozen-Tree/videos
A fresh Christmas tree doused with liquid nitrogen can spontaneously explode.
BUSTED
For a control test, a Christmas tree explosion was made using a detonation cord. Then, a second Christmas tree was sprayed with liquid nitrogen. But after half a hour and with the temperature of the tree plummeting to almost −330 °F (−201.1 °C), no explosion occurred, not even after Tory shot it with buck shot bullets. The myth was busted because conifers and other kinds of cold-climate trees have air spaces outside the tree cells large enough to accommodate the expanding water as it turns into ice, preventing them from freezing and thus preventing an explosion.
The website shows the video, but for some reason doesn't show the results-duh, but I found the summary below.
http://www.fancast.com/tv/Mythbusters/11339/1321592974/Mythbusters:-Exploding-Frozen-Tree/videos
A fresh Christmas tree doused with liquid nitrogen can spontaneously explode.
BUSTED
For a control test, a Christmas tree explosion was made using a detonation cord. Then, a second Christmas tree was sprayed with liquid nitrogen. But after half a hour and with the temperature of the tree plummeting to almost −330 °F (−201.1 °C), no explosion occurred, not even after Tory shot it with buck shot bullets. The myth was busted because conifers and other kinds of cold-climate trees have air spaces outside the tree cells large enough to accommodate the expanding water as it turns into ice, preventing them from freezing and thus preventing an explosion.