Ctna 'Why Not' sick leaves

[james mickelso]

If you can water the floor of the GH and run big fans along with your misters, that should drop the temps some. The RH is high so maybe you don't need the misters. Hard to get evaporative cooling with high humidity but with good strong air flow you might drop the temp by 10*f.

[VickiC]

Hey James...
"Been there, done that". Minimal luck, unfortunately. You're right, though. Your thoughts do work for me. Watering the floor does drop the temp. a tiny bit, but not enough to call the temp. decrease significant. Definitely not 10 degrees. I'm one step ahead of you (I think ??)...watering floor, misters, 4 fans (a small one sitting at the end of each bench (that oscillates), a large one on the floor under each bench)...even Port-O-Cool swamp cooler - and that fan is strong. Exaust fan, overhead vents. Geez, I'm at a loss....I must be doing *something* wrong. Whatcha think?

The floor is treated wood except under the benches. Under each bench, there is river rock instead of wood. My mister line is floor level, attached to the bench legs/braces and mist across the rock toward the walls. If I don't have the misters on, for whatever reason, I water the rock with a garden hose. Think I should omit the misters?

I made notes for an example of temp. and humidity at 3:00 pm today: 91 degrees outside, 96.5 in the greenhouse, 62% humidity outside, 61% in the greenhouse. I brought one of my favorite cattleyas inside, otherwise the blooms are gonna wither and die before their time. Sad but true.

I’m grateful for your help, but I sure would appreciate more All suggestions welcome...you and/or anyone. Thanks.
Vicki

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Originally Posted by james mickelso

If you can water the floor of the GH and run big fans along with your misters, that should drop the temps some. The RH is high so maybe you don't need the misters. Hard to get evaporative cooling with high humidity but with good strong air flow you might drop the temp by 10*f.

---------- Post added at 04:26 PM ---------- Previous post was at 04:20 PM ----------

Thanks, Betty. I didn't know about the bleach treatment. I've already sprayed it with Thiomyl. Should I spray with bleach also?

I was just typing to James about the heat problem I'm having. Since you and I have the same style greenhouse, are you having issues with the same things...or not? I hope not!

Thanks again for your advice,
Vicki

Originally Posted by BettyE

I agree with this advice, plus, I would spray the whole plant with the 10 % bleach solution. I have used this and it works! BettyE.

[katrina]

I don't have a g/h but my g/h friends all tell me the same thing...if the humidity is high their cooling equipment can't cool the space very well.

How big is your g/h?

You might want to post up a separate thread in the g/h section so other g/h growers can share what they do to combat extreme heat.

[VickiC]

I started a thread in the gh section ages ago about my heat problem, but I hadn't thought about doing it this time. Thanks...I will. I know it always helped me (and it certainly still does!) to read other people's thoughts/issues/problems, etc. - so as to help me figure mine out. I'm still having a problem uploading pictures because of a security token issue, so I'll wait to start a thread when I'm able to post pictures at the same time. One of the administrators has replied to me and explained things, but for some reason, uploading isn't working for me today, either. I've only had this problem once in the past, but it "worked itself out" (I guess I could say)...or I did something different when I uploaded the ones in this thread. ??

I agree.....I've found it to be so true that if the humidity is way high than the evaporative cooler doesn't work well. A guy at the company where I bought the swamp cooler from said that it becomes less efficient at 70% humidity. Even though he did, I bought it since I was grasping at straws.

This whole cooling and humidity thing really confuses me. I far from understand the way these two work together - along with outside the gh conditions. Wish I did!

As for the size of my gh, it is 10'3" wide x 17'6" long. As I started moving things into it soon after I bought it a few years ago, the words that many members had been saying sure hit home. Things like: You can't get a gh too big, buy as large as you can afford My goofy husband originally thought that we'd be able to cram all of the lawn plants in there for the winter, but he was oh so wrong. So, back to the garage the larger ones went.
Vicki

Originally Posted by katrina

I don't have a g/h but my g/h friends all tell me the same thing...if the humidity is high their cooling equipment can't cool the space very well.

How big is your g/h?

You might want to post up a separate thread in the g/h section so other g/h growers can share what they do to combat extreme heat.

---------- Post added at 11:50 AM ---------- Previous post was at 11:47 AM ----------

Thanks, Betty! I'm going to try that on the next very hot day. It's much cooler and raining today.

I'm glad watering the top is working for you.....I think about you and your heat in Texas.

Vicki

Originally Posted by BettyE

Vicki, when it does get very hot, I also water down the TOP of the greenhouse in addition to spraying down the floor. This does indeed drop the heat inside of the greenhouse without putting more water on the floor. I do this every hour on a very hot day! BettyE.

---------- Post added at 12:00 PM ---------- Previous post was at 11:50 AM ----------

You're exactly correct. According to the salesman at the company where I bought it, the evap. cooler becomes less efficient at 70% humidity. So, I'm still at a loss. If I don't water the floor and try to keep the humidity at a decent point, the temps go sky high.

Originally Posted by silken

I wonder if you stopped watering the floor and kept the humidity a bit lower, if your Porta Cool would work better.