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ospreynn

See what -10F (-23C) does to Pinus roxburghii, Araucaria angustif

15 years ago

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

Comments (28)

  • 15 years ago
    last modified: 11 years ago

    holy shibonkers. looks bad for that roxburghii - it could refoliage - wait till mid-june. I see some green on that Auracauria. wait... cut off the white dead tissue though.

    Dax

  • 15 years ago
    last modified: 11 years ago

    I'd wait until June, or a couple of weeks after the next heavy rain, to see for sure what has survived. But it doesn't look good. Very sad to see. :-((

    Yep, P. patula is hardier than P. roxburghii; quite a few of the former growing well in Britain, none of the latter.

    Resin

  • 15 years ago
    last modified: 11 years ago

    Also, the damage on the Cedrus deodara doesn't surprise me, that's why I've always rated this marginal in zone 7, except for the hardiest Afghan selections.

    BTW, how did the row of Pinus brutia do?

    Resin

  • 15 years ago
    last modified: 11 years ago

    Sorry to hear that. I was upset about relatively minor damage here when we went down to 19 F. P. patula is a really good species for us as it loves summer rain and has never been damaged by cold. Have you tried P. engelmanii? It might tolerate the cold.

    I bet the P. roxburghii and the A. angustifolia will send out new shoots from the main stems. Both seem to do that readily when damaged. What is your average low temps. in winter there? I have seen unbelievable carnage to plants this winter in El Paso and other areas of Texas and New Mexico. Glad to see maximartinezii and douglasiana survived though! You should also try P. pseudostrobus var. estevezii (I know it is no longer valid as a variety) as it has done really well here.

  • 15 years ago
    last modified: 11 years ago

    Yes just got to get hold of seed from high altitude
    forms of some of the above.Here in Britain we had
    a severe winter but I hardly lost any of my trees.
    Also plant groups of the same species.

  • 15 years ago
    last modified: 11 years ago

    "Pinus douglasiana"

    Forgot to mention, the earliest valid name for this species is Pinus gordoniana, published 1847, 96 years before Martínez named it a second time after Hartweg's name was overlooked.

    "You should also try P. pseudostrobus var. estevezii (I know it is no longer valid as a variety)"

    I agree with Perry in considering this a distinct species Pinus estevezii, it isn't at all like P. pseudostrobus. Closer to P. montezumae.

    Resin

  • 15 years ago
    last modified: 11 years ago

    I think the angustifolia is dead.
    Last winter we had one angustifoila outside and we had -20 C.No chance. But it was a long cold time over several weeks.
    So, wait and see.

    Wolfgang

  • 15 years ago
    last modified: 11 years ago

    Resin -

    Glad to hear you agree that P. estevezii is distinct. It sure seems distinct in cultivation.

  • 15 years ago
    last modified: 11 years ago

    Osprey, you have quite a few species native to summer-wet climates. Do you have a well or do you pay for municipal water?
    In any case, sorry about your losses. From what I've read that was a once-in-a-hundred years event out there. Oh well. Resin is always reminding us they happen!

  • 15 years ago
    last modified: 11 years ago

    @Dax

    the green you see is dried green, I scratched the bark at ground level and it is not green. I dont know if it will resprout from the ground level

    @Resin

    P. brutia are fine, but P. halepensis are toasted. I'm sure P. halepensis are ok, not like roxburghii which I think is dead. All the damage on the trees is just what I expected..... severe damage on roxburghii, strobiformis (south), araucaria angustifolia....but what about P. maximartinezii and douglasiana.... They survived at leat -20C. I believe you mentioned they get killed at -4C. It is a huge difference.

    @Salisacea

    P. engelmanii is very hardy. They get lower that -23C in their native range. They grow about 30 miles from where I have my trees, higher than my location. They did not have any damage on a single needle. I'm not sure what the average is, but we get down to 5-10F at least 10 a year, with 0F not uncommon. El Paso and Las Cruces gardens were severely damaged. All palm trees regardless of species are toasted. Only one or two species will survive. Even the local Ferrocactus suffered severe damage. I have P. estevezii, about 3 years old... no damage on them. By the way, it is defferent from pseudostrobus or apulcensis.... and it doesn't have the grass stage as montezumae.

    @david

    I have a well, with over 100 trees in the ground plus 200+ on pots, it will be too expenssive for me to pay for municipal water. Plus I have to water twice a month. It was a once in a hundred years for El Paso-Las Cruces, but only once in about 30-35 years for me.

    osprey

  • 15 years ago
    last modified: 11 years ago

    The maximartinezii is likely dead. With juvenile foliage, it is even less hardy. That green needles are still visible says nothing about the meristems. A maximartinezii with mature foliage can survive one Winter with -12°, but will likely die in the next one.

    Curious to see what will happen with the Cupressus benthamii. There is no doubt that it is hardier than the other species. No problem at -12° even in container.

  • 15 years ago
    last modified: 11 years ago

    No, P. maximartinezii is not dead. It just started to grow. It suffered severe damage, but not dead. So, how can you explain that. It is still in juvenile foliage and it survived at least -20C. C benthamii is also growing.... I will try to get some photos

    osprey

  • 15 years ago
    last modified: 11 years ago

    My young pinus estevezii

    {{gwi:657845}}

  • 15 years ago
    last modified: 11 years ago

    "No, P. maximartinezii is not dead. It just started to grow. It suffered severe damage, but not dead. So, how can you explain that. It is still in juvenile foliage and it survived at least -20C"

    Short answer, I can't! Unless it turns out to be P. pinceana mislabelled, or something like that! Or else your protection measures were more effective than expected.

    Resin

  • 15 years ago
    last modified: 11 years ago

    No, it is P. maximartinezii. I received the seeds from somebody who collected them himself. I know the buckets helped for some time, but not for long......

  • 15 years ago
    last modified: 11 years ago

    Very interesting but if the second winter will be so hard I think that P.maximartinezii will have big problems to survive.

    I like the long needles of Pinus estevezii.

  • 14 years ago
    last modified: 11 years ago

    Osprey - any updates?

  • 14 years ago
    last modified: 11 years ago

    I am not shocked maximartinezii survived. The highlands of Mexico were much colder in the last ice age. There is likely some hardiness built in.

    [O/T]. My Platanus mexicana survived -10F with no ill effects in the same weather.

  • 14 years ago
    last modified: 11 years ago

    Any updates Osprey? How are they a year later?

  • 14 years ago
    last modified: 11 years ago

    Hi, thanks for your interest!!.. Araucaria angustifolia, Pinus strobiformis (Jalisco) and Pinus maximinoii didn't make it... cedrus deodara were just fine, they looked like Larix by late April, but doing well. surprisingly Cupressus benthamii, Cupressus lindleyii, Pinus maximartinezii, Pinus patula and Pinus nelsonii did just fine, some damage, but back on track.
    Pinus roxburghii is a different story, it started sending new growth by May, not from the buds, as they were frozen. There was juvenile foliage in the bottom 2/3 of the tree, with the top dead. Then, branches started to die throught the year, one by one, until it got to the botton 1/3. This year the buds started to swell early, but then we got 4" of snow in late March and -14C, which killed all the buds and the leaves. We'll see if it survives, but its future doesn't look promising.......

    osprey

  • 14 years ago
    last modified: 11 years ago

    Thanks for the update. Too bad about the P. roxburghii, but, it is considered a zn 9 species, even less hardy than supposedly zn 8 Araucaria angustifolia. None in the UK, even Cornwall = not very hardy.

  • 14 years ago
    last modified: 11 years ago

    no problem David... yes, everyone keep telling me that, but I guess hotter summers help. Same goes for P. maximartinezii...

  • 14 years ago
    last modified: 11 years ago

    After reading that maximatinezii survived -10, I am contimplating planting my 3' that I have in a pot. Do you think the dry cold aided in its survival versus damp cold? Would hate to loose this rare pine but this gives me hope that it could possibly survive our winters that seldom dip below the low teens.

  • 14 years ago
    last modified: 11 years ago

    Where are you located? I believe my conditions helped.. which resemble more those of their native environment. Does your plant have adult foliage... plants with adult foliage are suppose to handle cold weather better, but I guess there is only one way to figure that out..

  • 14 years ago
    last modified: 11 years ago

    Osprey, do you recall where you got your P. patula? About how long did it take it to get that big?

  • 14 years ago
    last modified: 11 years ago

    I got it from forest farm.. and it took about 3 years to get that big. It is the only pine I have that grows more than once a year... 3 times ones year!!!

  • 14 years ago
    last modified: 11 years ago

    Anyone had any experience with Jap. White pine in NE Texas?

  • 14 years ago
    last modified: 11 years ago

    After -18c and now many frost wind :
    {{gwi:657848}}
    Pinus rigida WB
    {{gwi:657851}}
    Pinus sylvestris ...
    {{gwi:657853}}
    Pinus nigra ...
    {{gwi:657854}}
    Pinus mugo ... and many other like many young pseudotsuga menziesii.
    Clement

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