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humidity help

This is a discussion on humidity help within the General Orchid Culture forums, part of the Orchid Culture category; Since I have moved my orchids to a new location and are now under lights, ...

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  1. #1
    OrchidTraci's Avatar
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    Default humidity help

    Since I have moved my orchids to a new location and are now under lights, I was wondering how I can raise the humidity. I don't know how accurate my humidity measurer is, it came with a small room humidifier I bought some time ago. It readsbetween 40 and a little under 60% whereas, upstairs it was always at 60%. I don't want my plants unhappy. The humidity is with a humidifier and several jars of water on my bench. Thanks !

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    The water will evaporate faster and give you more humidity if you put it in shallow trays with greater surface area rather than in bottles. You can hook up an aquarium air pump to an airstone that's submerged in the water and that will really help more water evaporate. The humidity in the greenhouse averages about 60-70% unless it's measured right after watering, in which case it goes way up and stays there until the plants dry off. Other than the airstone / shallow container, if you need to increase still further, you may have to get another humidifier.

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    Default hygrometer readings

    http://www.orchidculture.com/COD/humidity.html

    an interesting and fairly quick read regarding humidity readings. i found it helpful if not a bit disappointing, since i had recently bought a hygrometer/thermometer.

    spending a little time and getting a feel for how wet the air is has at least got me to be able to tell the difference between gross humidity changes. suppose i'll get more sensitive to it the longer i grow these things. i know i'm a lot more comfortable since i started, and the atmosphere is much more pleasant in here.....anyway, hope it helps.

    p

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    Ki_in_NoVa is offline Senior Member
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    Well, I started writing a rant on sharing a room with orchids, but then I realized (again) how crazy things are chez moi. (Orchid dictatorship.) If you want to hear it, let me know. It'll take up a page or two.

    Keep in mind that humidity dissipates quickly. If you have air circulation, trying to create a microclime around the orchids is pretty much impossible. Exceptions are the minis because they can be close enough to the humidity source that they benefit before it dissipates. For anything that's tall or more than a foot away from the humidity source, you can forget microclimates. You'll just have to increase the room humidity. (For this, I think humidifiers are the best solution.)

    Water should evaporate pretty quickly under the lights - especially if you have a tiered system so the trays get warmth from the lights below as well. Some extra damp moss lying about can help - but this can be a home for springtails and fungus gnats etc. Clay aggregate or lava rock are good in the trays as they wick up water and create a large surface area from which water evaporates. Putting your pots on upside down clay pots sitting in water can also help. (But I think this helps the mini low-light orchid that's next to the upended pot - not the plant sitting on top.) Some people have had good luck with a fogger too.

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    Quote Originally Posted by lja
    The water will evaporate faster and give you more humidity if you put it in shallow trays with greater surface area rather than in bottles. You can hook up an aquarium air pump to an airstone that's submerged in the water and that will really help more water evaporate. The humidity in the greenhouse averages about 60-70% unless it's measured right after watering, in which case it goes way up and stays there until the plants dry off. Other than the airstone / shallow container, if you need to increase still further, you may have to get another humidifier.
    I've been trying to get to the place that sells the humidity tray I bought a while ago, but everytime I go there they are closed! grrr. I know they help much more than bottles, but it is what I can use for now.

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    [QUOTE]Clay aggregate or lava rock are good in the trays as they wick up water and create a large surface area from which water evaporates.[QUOTE]

    I have one tray filled with pebbles, it works nice, but the one and only store I bought it from never seems to be open when I go there. Very. frustrating.

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    donsjuand is offline Junior Member
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    I use a glass table tray I bought at the dollar store with rocks and it works well for me. I think I paid 4 dollars for it and it's nicer than those cheap plastic ones and need to be refilled about every 8 days in a really dry apartment. Check it out: http://www.rv-orchidworks.com/orchid...tml#post184346

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