The Orchid Forum, for the UK and Europe (previously known as The UK Orchid Forum) • View topic - Humidity
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 Post subject: Humidity
PostPosted: Thu Apr 13, 2017 6:50 pm 
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Treated myself to 3 beautiful phals and was wondering how many of you place your orchids on a tray of pebbles to help with humidity?

The humidity in the room where the orchids are kept is around 41% with a temperature of 20 degrees celcius


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 Post subject: Re: Humidity
PostPosted: Thu Apr 13, 2017 7:07 pm 
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I honestly dont think a tray of pebbles will raise humidity at all. The leaves dont mind so much the dryish air but roots love humidity. If you can keep the roots moist it should be ok.

An alternative thats becoming more common is full or semi-water culture, basically no compost but the tip of the roots touching water, like in the bottom of a glass vase. Were trying it on a few types including phaelenopsis, bit early to tell yet whether its really going work but my mothers shrivelled up phal perked up very quickly.


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 Post subject: Re: Humidity
PostPosted: Thu Apr 13, 2017 7:09 pm 
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Thank you - will go without the pebble tray then for the time being. Good luck with the water culture - let us know how it goes with the Phals


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 Post subject: Re: Humidity
PostPosted: Fri Apr 14, 2017 9:13 am 
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I know when I first got into orchids (phals at first) and started to read up on their care, there did seem to be a lot of emphasis on high humidity (for most orchids).
So I also did the saucer of pebbles trick as suggested on many websites, placing saucers beneath each one, then I bought a Humidifier which emitted timed visible jets of mist, but all those were dumped years ago.
Phals look like exotic, delicate flowers needing tender care but I've always found them to be one of the most obliging, toughest & resilient of the orchids.
My grow-room humidity also averaged around 40% but I've even dumped the Hygrometer (because I can hang an extra mounted orchid in its place).
Certainly with Phals, I believe as long as they are well hydrated, they shouldn't need all the extras of saucers, humidifiers and mistings etc.

Steve



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 Post subject: Re: Humidity
PostPosted: Fri Apr 14, 2017 9:15 am 
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Thanks Steve


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 Post subject: Re: Humidity
PostPosted: Sat Apr 15, 2017 10:02 am 
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Phals do perfectly well as houseplants, even with central heating. They do do better with higher humidity but it certainly isn't a deal breaker for them.

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 Post subject: Re: Humidity
PostPosted: Tue Apr 18, 2017 11:13 am 
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Humidity will fluctuate throughout the day (even in the home) 40% min is good enough to keep many Phals.

A humidity tray does work to a degree, but that degree is actually dependent on how deep the tray is. Most of the time the plastic pots they are in will keep enough humidity around the roots of a phal and just keeping them in a slightly larger container can make up for moisture loss.

I experimented a little with humidity readers and humidity trays, and yes, just a standard tray with no raised sides (above the level of the gravel by a good few inches) wont do much if anything at all. Though a semi terranium set up (lidless tank or tub) will keep the humidity up better (by up to 20% or more).

But it is worth remembering that ventilation is also key, if you raise the humidity but do not have sufficient air movement you will likely invite rot to set in.

For the most part with Phals (apart from the species ones) as long as you water when the plant needs it (when the roots are silvery) they'll keep going.


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