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: Sat Nov 07, 2015 10:28 pm 
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My greenhouse temp is set at 14c and only rises if the sun shines. The humidity is high always around and over 90%. I have strong lights over my multifloral paphs which don't produce any heat. I have plenty of air movement. My question is this-- I am going away for 16days and wondering if my plants can go this length of time without watering? Should I reduce the air movement which I think will reduce evaporation in the pots? Should I turn off the lighting so as to reduce the growing cycle? How long can they be left dry rather than wet?
Thanks,

Ed


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 Post subject: Re: Humidity?
PostPosted: Sat Nov 07, 2015 11:05 pm 
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If I go away I prefer to keep my orchids on the dryer side. You could possible water uptight thoughs that, need more water I would turn the lights off. I wouldn't personally lower the air movement as if we have low temperatures it's could increase the humidity to much and cause leaf problems. When I have grown a few off my cooler paphs they have gone a good month with out water.
Or if it is possible I'd say change your watering a little so they would need a water just before ur leaving that way they wouldn't be drying out normally whole ur away than half way between if you get my drift.


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 Post subject: Re: Humidity?
PostPosted: Sun Nov 08, 2015 1:51 pm 
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Hi Ed,

You should have no problem with your plants over the 16 days. The humidity is well enough at this time of year and is sounds balanced with your good airflow and temps. I've watered this morning and will not water some of them again for a fortnight. My temps are similar to yours but my humidity is a lot drier at around 50-60% with good airflow. Some of my pots often dry out between waterings with no problems. If they become extremely dry by chance I water first with RO water then again with the akerne. Paphs are extremely hardy and can tolerate drought a lot better than you think and this period should cause no problems. It's the excessive water that's the problem.

Gary


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 Post subject: Re: Humidity?
PostPosted: Sun Nov 08, 2015 3:16 pm 
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I live in: United Kingdom (England)
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Thanks Gary. I will water on Monday and leave them until the 26th --- and blame you if it goes wrong!!!!!!!
Ed



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 Post subject: Re: Humidity?
PostPosted: Mon Nov 09, 2015 10:31 am 
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I went to Australia last year for a month over Christmas and new year and didn't trust my neighbour so left them to there own and all were fine on return and now some are spiking mainly cymbids and a few pahps


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