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Cold snap - which orchids to bring indoors?

This is a discussion on Cold snap - which orchids to bring indoors? within the General Orchid Culture forums, part of the Orchid Culture category; The next few nights our temperatures are predicted to fall to 5C (41F), compared with ...

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  1. #1
    Delila is offline Member
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    Default Cold snap - which orchids to bring indoors?

    The next few nights our temperatures are predicted to fall to 5C (41F), compared with our usual Winter minimum of 10C (50F). Please help me to remember which orchids I should bring indoors during these nights. I have soooo many types and don't want to forget some poor cold-averse individual.

    The Phals are already inside of course. Who else should come in?

    Thank you

  2. #2
    ksriramkumar is offline Senior Member
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    Vanda's don't like temperatures below 12C and same with some of the dendrobiums . what other genus do you grow so that specific suggestions could be provided

  3. #3
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    chemist is offline Senior Member
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    Just bring them all in it wont be worth in opposite to loosing any.
    Im not expert at all, but i heard only cymbidiums natural habitat 40F at night.

  4. #4
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    I would agree with The Chemist...bring them all in just to be sure.

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    Delila is offline Member
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    Ooh... I can't bring them all in. That will be like moving house

    I'm wondering which ones could be seriously damaged by a few hours at those temperatures, rather than just disliking it. If they dislike it, bad luck. If they will be harmed or killed, then the bathroom it is!

    e.g. Apparently L. tenebrosa, Max. tenuifolia and Stan. (something) dislike cold, but I'm not sure how harmful it really is for them.

  6. #6
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    gnathaniel is offline Senior Member
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    I've found certain lowland Bulbophyllum, Phalaenopsis, and other vandaceous species the most sensitive to cool temps (my main growing area occasionally sees overnight lows of 35 F/2 C in the dead of winter), but many other species of the same genera (and sometimes individuals of the same species) are completely okay with those temperatures, so difficult to advise you without knowing more specifics of your collection. Hybrids can be tricky to predict, as they often combine highland and lowland-growing species and breeders rarely select for extreme temp-tolerance so there can be a lot of variation from individual to individual. Based on my experiences with several hundred primarily mid- to higher-elevation/latitude species, I'd guess that most of your plants will survive and show little/no stress from a few hours at 5 C, but as I said hard to generalize. Just keep them a little drier than usual to stave off cool-loving fungi, and maybe keep early morning sun off them so you don't get tissue damage from too rapid a warm-up. Hope this helps!

  7. #7
    Delila is offline Member
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    Thanks for those tips.

    I know what you mean about the variation. I was umming-and-ahhing about buying an Aranda Chao Praya Blue, but that one not only does better through Winter than any of my Vandas but actually keeps growing, like there's no problem! I have two Rhy. gigantea varieties that share a basket, bought at the same size from the same seller on the same date; one is now 10" across and spiking, and the other consists of a single 0.5" leaf and a 0.25" root - almost dead.
    Last edited by Delila; June 1st, 2015 at 07:10 PM.

  8. #8
    Delila is offline Member
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    Well, I discovered that Angraecum sesquipedale seedlings cannot handle warm-intermediate Winter temperatures, despite so much online talk that this being an intermediate plant. The weather only hit 8C, yet it dropped all of its leaves. Never seen that happen before!

    I've brought it indoors but expect it to die. An expensive purchase ... only had it for 5 days! It must have been the adjustment too.

  9. #9
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    78Terp is offline An Avant Gardner
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    Sorry to hear, but on the bright side, sounds like everyone else is doing OK.

  10. #10
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    Hello fellow friend from across the ditch , the cold snap has hit here too. I think all your " warm " and " intermediate " should be brought inside just incase. Cyms should be alright they are tough as old boots!

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