See what -10F (-23C) does to Pinus roxburghii, Araucaria angustif
Early February we had some extreme low temperatures, of course, for most of you this is not extreme. The lowest registered during that three day low temps spell was -10F (-23C). The maximum during the next day (mid day) was ��"9C… followed by two days with subzero temperatures and nights dipping into the 0F. Pine trees (unknown species) at least 40 years old suffered sever frost damage. Quercus virginiana suffered from 50% to 100% defoliation. My leghorn roosters suffered from frostbite on their combs. They lost about 50% of their combs, even when they were inside an adobe barn with open windows on only one side.
I protected only four of my young Mexican species: Cupressus benthamii (Hidalgo), Pinus douglasiana (Jalisco), Pinus strobiformis (Jalisco) and Pinus maximartinezii…… all of them survived. I used a plastic bucket to cover them, and inside the bucket I put on quart of water (1 lt) in a small container. As water freezes, heat is released. Well, the small container was frozen solid in a couple of hours, and I did not replace the water after that. That makes me doubt about the very low hardiness some of those species are believed to have.
This is a photo of my Pinus maximartinezii
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Pinus douglasiana
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Cupressus benthamii
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On the other hand, 2 of my 3 Cedrus deodara suffered some damage on their leaves, but both of them just started to grow. We have had above average temperatures now.
Cedrus #1
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Cedrus #2
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My Araucaria angustifolia is toasted, all the way to the bottom. Will that resprout from the ground level???
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Also, my Pinus roxburghii suffered major damage. These photos show Pinus roxburghii and Pinus patula. I now see Pinus patula is hardier that roxburghii
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Pinus patula
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I’m not sure if my Chir pine will make it. Buds look ok, and when you pull on the leaves, you still see green (see pic). What worries me, is that one week after that, it only had its tips burned, but 3 weeks after that all the green is dead, like when you cut grass, dull green.
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This is just a pic of my Abies koreana, a desert survivor in its second year. Not looking too bad. By the way, its been a very very dry year so far, almost 7 months without rain.
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osprey
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