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Author Topic: Plunge temperature for orchids  (Read 5212 times)

Tony Willis

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Re: Plunge temperature for orchids
« Reply #30 on: December 29, 2012, 11:42:32 AM »
Mark

I have seen this sometimes on both ophrys and orchis,different plants,different years. It may be virus and if it is does not seem a problem but I have always put it down to stress,both mine and the plants. We do not provide optimum growing conditions and yet expect them to perform.

Keep the aphids away just in case but otherwise I would ignore it.
Chorley, Lancashire zone 8b

Anthony Darby

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Re: Plunge temperature for orchids
« Reply #31 on: December 30, 2012, 09:37:52 AM »
I agree, although my experience is much more limited. I would be delighted to see such good growth and would misquote Nelson: "I see no virus".
Anthony Darby, Auckland, New Zealand.
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krisderaeymaeker

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Re: Plunge temperature for orchids
« Reply #32 on: December 30, 2012, 08:32:15 PM »
Interesting topic ! I grow my Ophrys and Orchis in my greenhouse . I keep it just frostfree because I grow my cacti in the same enviroment...
Just a few pictures from my collection ...   
Kris De Raeymaeker
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Belgium

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Tony Willis

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Re: Plunge temperature for orchids
« Reply #33 on: January 10, 2013, 05:24:11 PM »
my first ophrys is now open - -Ophrys lutea
Chorley, Lancashire zone 8b

mark smyth

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Re: Plunge temperature for orchids
« Reply #34 on: January 10, 2013, 07:18:08 PM »
Looking great Kris.

Mine are developing fast which is probably down to the double figure temps we had for about a week
« Last Edit: January 10, 2013, 10:17:44 PM by mark smyth »
Antrim, Northern Ireland Z8
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When the swifts arrive empty the green house

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krisderaeymaeker

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Re: Plunge temperature for orchids
« Reply #35 on: January 10, 2013, 08:59:55 PM »
Looking great Kris.
Mine are developing fast which is probably down to the double figure temps wer has for about a week

Thanks Mark , you're right ...they are really fast now! The first signs of flowers showed up in one week.
But here we expected some wintercold for the weekend.... 
Kris De Raeymaeker
from an ancient Roman settlement near the Rupel
Belgium

"even the truth is very often only perception"

"Small plants make great friends"

SteveC2

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Re: Plunge temperature for orchids
« Reply #36 on: January 10, 2013, 10:10:37 PM »
O.K. so the temperatures are higher than normal, but the light is minimal, maximum eight hours daylight, mostly overcast.  Can't say that I'm seeing any real signs of accelerated growth.  Are you using lights or is the west of the U.K. actually seeing the sun?  Actually I think Kris in Belgium might be closer to me than Mark!  Have you actually got sun? ;D
« Last Edit: January 10, 2013, 10:12:22 PM by SteveC2 »

mark smyth

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Re: Plunge temperature for orchids
« Reply #37 on: January 10, 2013, 10:21:07 PM »
no lights and yes it been over cast most of the winter with only a day or two bright sunshine. At this time of year my green house only gets direct sun, when it shines, for the last hour. In a few weeks morning sun will shine on the green house again
Antrim, Northern Ireland Z8
www.snowdropinfo.com / www.marksgardenplants.com / www.saveourswifts.co.uk

When the swifts arrive empty the green house

All photos taken with a Canon 900T and 230

mark smyth

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Re: Plunge temperature for orchids
« Reply #38 on: January 13, 2013, 11:19:45 AM »
One of my Anacamptis morio is looking sick. Close inspection shows a small colony of aphids. They will be sorted when Homebase opens. I suppose I should treat all plants while I'm at it
Antrim, Northern Ireland Z8
www.snowdropinfo.com / www.marksgardenplants.com / www.saveourswifts.co.uk

When the swifts arrive empty the green house

All photos taken with a Canon 900T and 230

Tony Willis

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Re: Plunge temperature for orchids
« Reply #39 on: January 13, 2013, 11:50:48 AM »

Keep the aphids away just in case but otherwise I would ignore it.

You should have sprayed as a precaution and now definitely need to get on top of it.
Chorley, Lancashire zone 8b

Tony Willis

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Re: Plunge temperature for orchids
« Reply #40 on: January 22, 2013, 03:20:10 PM »
I have recorded the air temperature in my greenhouse and the air temperature above my plants in their insulated box at soil level.

These were -4c in the greenhouse and +4c in the box. The soil warming cable has not been activated and that is set at +5c  five cms below the sand surface. At the moment the ophrys look fine and many are sending up flower shoots.
Chorley, Lancashire zone 8b

mark smyth

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Re: Plunge temperature for orchids
« Reply #41 on: January 23, 2013, 07:20:34 PM »
-16C forecast for tonight in the midlands

I checked various temperatures just now 7pm
air 4C
soil 1.2C
unheated plunge 2.6C
heated, gasp, 6C. I'll check it again in the morning after turning it down until the thermostat clicked off.
Antrim, Northern Ireland Z8
www.snowdropinfo.com / www.marksgardenplants.com / www.saveourswifts.co.uk

When the swifts arrive empty the green house

All photos taken with a Canon 900T and 230

 


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