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Author Topic: Greenhouse humidity  (Read 1812 times)

Garcinia

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Greenhouse humidity
« on: February 10, 2017, 12:36:09 PM »
Currently my greenhouse is under construction, but before I put in the humidity system I'm wondering if 75% humidity (that's what's best for orchids in general) is enough for ultra tropicals? The heat will be different since some will live on heat mats (in addition to the heater) but the humidity will be uniform.

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Schutzhund

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Re: Greenhouse humidity
« Reply #1 on: February 10, 2017, 02:26:14 PM »
I've heard that 80% humidity is good for ultra tropicals
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Finca La Isla

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Re: Greenhouse humidity
« Reply #2 on: February 10, 2017, 06:21:40 PM »
75% might be enough although more would be better than less I figure.  What temperature are you planning on, that could be more important than slight differences in humidity?
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Garcinia

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Re: Greenhouse humidity
« Reply #3 on: February 10, 2017, 07:06:49 PM »
Quote from: Finca La Isla on February 10, 2017, 06:21:40 PM
75% might be enough although more would be better than less I figure.  What temperature are you planning on, that could be more important than slight differences in humidity?

I have to see what heater I'm getting. I'll be using heating pads (or evaporative coolers if necessary) to supplement temps in the greenhouse if too cold.
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Garcinia

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Re: Greenhouse humidity
« Reply #4 on: February 10, 2017, 07:07:57 PM »
Quote from: Schutzhund on February 10, 2017, 02:26:14 PM
I've heard that 80% humidity is good for ultra tropicals

Yeah I've heard the same. I'm just worried about rotting some of the orchids. My friend's corpse flower does fine in the greenhouse at 75%, which is one of the non-fruit ultra-tropicals I'll have in my greenhouse.
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Finca La Isla

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Re: Greenhouse humidity
« Reply #5 on: February 11, 2017, 02:30:11 PM »
What's interesting in the equatorial zones about humidity is that the same relative humidity feels more humid in the lower warmer areas than it does at an altitude of 3-5000'. Many of the orchids that people want to grow come from altitudes in the mid to high range while the fruits are from the lower ranges.
For example, in Costa Rica the best orchid collections I know of are in areas of 1000-1500m altitude.  But you couldn't grow a mangosteen at 1500m here even though we are only 9 degrees from the equator.  At higher altitudes they grow Hass avocadoes but down here where the durians grow we can only grow the FL avo types.
This all has to do with temperature more than humidity.
Peter
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Bush2Beach

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Re: Greenhouse humidity
« Reply #6 on: February 13, 2017, 12:04:40 PM »
What is the humidity in the Arboretum that you work at, with the ultra tropicals?
There's still 20 ft Mango and Coconut tree's in there ?
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