Trying to raise humidity for Haraella retrocalla
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  #1  
Old 01-21-2014, 12:16 PM
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RosieC RosieC is offline
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Default Trying to raise humidity for Haraella retrocalla

Not sure this is the right place as this isn't really a Terrarium and I'm not really a terrarium grower... but someone at a show I went to was once demonstrating how terrariums could be made of anything and some could be quite small.

I'm looking for comments on whether this attempt to raise humidity for my Haraella retrocalla is likely to help. It's based on knowing that moist air falls, and so I'm hoping that even though the top is completely open it will still raise humidity around the plant.

I bought this plant in November and since then it's leaves have noticably wrinkled. The seller said they water twice a week in the winter, but I soon decided that was not enough and went up to daily, even twice some days, and still it's very wrinkled and drying very very quickly.

I believe this plant is one that appreciates high humidity so I've trying to work out how to do that, while it's too cold in my more humid greenhouse.

So this is basically a 2liter pop bottle with the top cut off. The plant mount hangs on the side, I put a little bit of water in the bottom, not touching the mount. Then hang the whole lot back in the window where the mount used to hang.

So... is it going to help, do I need to try and close in the top (possibly putting the top of the bottle back over it )

This is in the house where winter humidity is not massively low, but is still lowish due to central heating.

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Old 01-21-2014, 12:55 PM
ALToronto ALToronto is offline
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Trying to raise humidity for Haraella retrocalla Female
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I bought a little water-bottle humidifier, and it's made a huge difference for my seedlings. You can spend $60 on Air-O-Swiss, or 1/4 as much on a chinese-made knockoff, and they both work just as well. It's a tiny unit with the footprint of a small cell phone, and the reservoir is an overturned water bottle. I fill it with RO water twice a day (1 litre bottle), and my seedlings are basking in 80% RH while the rest of the windowsill makes do with 40%. Here's a photo of the Swiss-made unit:

Home Hardware - Travel Ultrasonic Humidifier
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Old 01-21-2014, 02:26 PM
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Subrosa Subrosa is offline
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Trying to raise humidity for Haraella retrocalla Male
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I was told to never let mine dry out. It was mounted on a stick about 15 mm in diameter and 10 cm long, and I simply suspended it with the bottom 2-3 cm constantly in the water. It was over an aquarium, but I seriously doubt the humidity ever hit 70% and probably averaged 50% or less. It did fine, putting on new leaves, roots and blooming for me. I've since moved it into a terrarium with constant high humidity, and it does seem to be growing faster, but it certainly wasn't a necessary move.
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Old 01-21-2014, 04:01 PM
ronaldhanko ronaldhanko is offline
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There are small hanging glass globes that might work, Rosie, especially if you put some damp moss at the bottom. They are round or pear-shaped and have a hole in one side and a loop at the top for hanging.
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Old 01-21-2014, 05:42 PM
Ordphien Ordphien is offline
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Trying to raise humidity for Haraella retrocalla Male
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Nice solution! I do something similar with my carnivores plants outside.
The globe or pear shaped hanging planter is a great idea.
They are attractive, would easily fit a retrocalla, maintain high humidity, and have great air flow.
They sell them in multiple sizes.
The most common around here is marketed as a tillarium? I think...
This one doesn't have the orchid inside but you get the idea.

A nice wide mouth.

And vent holes at the top.


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Old 01-22-2014, 07:15 AM
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Thanks everyone

The good news is that this morning the roots did not look completely dry. I watered it when putting it in the setup and it hadn't dried overnight which it usually would. However I had watered twice yesterday, which might also be the reason, so I'll keep an eye over the next few days.

Interesting humidifier ALToronto, might have to think about that for my small areas in my greenhouse that I want to keep higher humidity. The problem is here that it's in the house and I don't really want to raise humidity in the area as a whole, not sure I could contain it in an area with out raising humidity in the whole house.

Interesting idea Subrosa about having the mount always in water. I wondered if I should bring the water up a bit in this setup but I'm worried about going to far the other way (I worry a lot ).

Ron & Ordphien, I actually have a small one of those pear shaped globes that I used to keep a lepanthes calodictyon in. I think I would have to find a larger size for this though. It did cross my mind yesterday to use that, but the one I have is too small to use with the mount as well, and I don't want to disturb the roots at this time of year to pot it into moss or something. I think I will look out for some of the larger globes (they had some when I bought the one for the lepanthes) in the summer when I hope to go to an international show, I think they are sold by a US or South American nursery.

The problem I think I had with the lepanthes was that it got to warm and cooked inside the globe, so I would have to be careful with where I put it, especially in the winter when most light places also have radiators under them... I think that's what did in the lepanthes.
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Old 01-22-2014, 08:18 AM
TOMMYMIAMI TOMMYMIAMI is offline
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Trying to raise humidity for Haraella retrocalla Male
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Rosie, it will work. One of mine is mounted on the piece of wood attached to the drift wood that is inside the vase, on the bottom of the vase is life sphagnum and little bit of the water. That guy is sitting above it, and it's very happy, growing well and in spike for past 4 months nonstop. The life sphagnum and water on the bottom create enough humidity, top is also open, no fens or anything else for this setup!
PS: Something must be seriously GOOD in this setup, even the cutting of my Scaphyglottis prolifera that is on the top of the drift wood has OPEN BLOOM now! I had that sucker for years, it did never bloom outside till this fall when it gave me 1 bloom only on the huge mother plant, this guy gets hardly some water, and it is just a small cutting, and it has 2 blooms already!!!

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Old 01-22-2014, 08:23 AM
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Thanks for the photo & description of yours Tommy, that looks really good. Mine is definitely not aesthetic, but if it can be successful in increasing humidity I'll be happy
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Old 01-22-2014, 02:28 PM
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Good news is some of the roots are still green when I've got home tonight, usually it would have completely dried by now
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Old 01-22-2014, 10:33 PM
Orchids4ever Orchids4ever is offline
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Trying to raise humidity for Haraella retrocalla Female
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Quote:
Originally Posted by ALToronto View Post
I bought a little water-bottle humidifier, and it's made a huge difference for my seedlings. You can spend $60 on Air-O-Swiss, or 1/4 as much on a chinese-made knockoff, and they both work just as well. It's a tiny unit with the footprint of a small cell phone, and the reservoir is an overturned water bottle. I fill it with RO water twice a day (1 litre bottle), and my seedlings are basking in 80% RH while the rest of the windowsill makes do with 40%. Here's a photo of the Swiss-made unit:

Home Hardware - Travel Ultrasonic Humidifier
Thank you,AlToronto
I got 2 of them today ( they where 50% off ) I was looking for them because my other small one died on me -they work great-
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