93 degrees, too hot?

headshots420 said:

you're talking mid 80's and he's talking mid 90's that's a 10 degree difference which is huge. Indoor and Outdoor growing are not the same thing. Just because plants handle high outdoor temps does not mean it will handle indoor heat stress well. I've grown myself and i've read multiple grow guides and bibles. Every book I have read and my experience with indoor grows tells me that 90+ degrees at the minimum will stunt or slow a plants growth. Sure it may not kill the plant but why put unnecessary stress on the ladies?

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Does the grow bible tell you how the plants know they are inside?

PaOol,

What is the prognosis on your temps now? You've got a few days to figure out the problem before you need to get your seedlings under serious light. Check out this setup in the photographs. It's clearly a ghetto setup but it fits my closet and my budget. You can see that there is a lot of air flow from a "tornado" type fan at the bottom, set on low. The autoshade has a dual purpose it acts as a wind tunnel and a light tunnel. The air only can escape through the top so the blow-bye cools down the heat that may come from the lighting. The fan at the bottom also blows directly on the pots and sucks some heat away from the roots as the air flow moves up the plant. My ambient room temps are at least 85 and frequently 90 by the end of the day. But with this setup there is very little mixing of the effluent air (at top) and the influent air at bottom.

If your current setup is two rubermaids stacked with CFL ballasts contained inside and 4 little fans pushing recycled warm air at your plants your plants are going to get warm and be slow growers.

Root temp should be your concern. You can heat the green zone up to at least 100 without any problem but the roots should stay cool (80 degrees or less if you can manage).

Here is a suggestion to think about. Your grow case is the inner habitat for your plants. But if you put the grow case in the closet then the closet becomes the habitat for your grow case. If your effluent and influent are mixing in the closet then the Rubbermaids are going to get old warm air inside them. You need to monitor the primary habitat(rubermaids) along with the secondary habitat (closet). Ventilate the closet so that the cool air and warm air don't mix. Use a cardboard crafted ventilation ducts to keep the old and new air from mixing.

I've been using autoflower strains (20/4) so I don't have to worry about absolute darkness and I can let my setup breathe a little more. I also have my plants sleep after sunset so I don't have to worry about daylight fucking up their sleep.

fabfun said:

you sure it isnt good for you?

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At the very least, it's worse than Cannabis!

fabfun said:

thats why i run my lights at night when cooler temps

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Good idea although doesn't that make it too hot during the dark period?

bigv1976 said:

Does the grow bible tell you how the plants know they are inside?

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No but i would take jorge cervantes word on it before i took the word of someone such as yourself who has just started growing a few months ago..Sure you may have a ton of posts.. The fact is you started growing earlier this year dude. I think the writers of the 2 grow bibles and multiple articles i've read know just a little bit more about growing then you do...but hey who knows maybe you're right.

I have read alot of Jorges work and never seen hime write about plants knowing the difference between indoors and out.

i measured my temps with the lights off and no air running.

its 79 F and 41% humidity.

if only my lights gave off no heat =\

Switch to fluorescents.

im using CFLs >_>

not with no lights on and fans running and whats my other option to have it hotter during lights on an cooler with them off

Weedoozie said:

At the very least, it's worse than Cannabis!


Good idea although doesn't that make it too hot during the dark period?

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Doesn't look like anyone read my first post but I found a cheap and easy solution for you. Just build this at any scale that fits your grow area.

http://www.youtube.com/watch?v=QTWQv-Gkkew&NR=1

If it doesn't fix your temp it will still allow the plant to transpire more quickly which means the plant will be able to cool itself more efficiently which is the most important part of this problem is it not? Low humidity and air flow will do this regardless of what your thermometer is saying. If your plant is able to cool itself and use the stoma for gas exchange then the more heat the better up until that heat is causing the stoma to be blocked off with too much water while it's trying to transpire.

that homemade a/c fan doesn't seem very practical because it would last maybe 15 minutes?
and afterwards the temps would just go back up.

cool link will study it some more but i tried ac in grow room and had to shut it down to high of humidity but when i build new room soon i might try something like this

nuggpuffer said:

Doesn't look like anyone read my first post but I found a cheap and easy solution for you. Just build this at any scale that fits your grow area.

http://www.youtube.com/watch?v=QTWQv-Gkkew&NR=1

If it doesn't fix your temp it will still allow the plant to transpire more quickly which means the plant will be able to cool itself more efficiently which is the most important part of this problem is it not? Low humidity and air flow will do this regardless of what your thermometer is saying. If your plant is able to cool itself and use the stoma for gas exchange then the more heat the better up until that heat is causing the stoma to be blocked off with too much water while it's trying to transpire.

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these getto ac units really work man im totally impressed.. but you just have to be a little more creative in design and your res cant be in the same room..

Interesting video. But its not really like AC. AC works from the rapid evaporation of refrigerant gases. Sorry. Feeling a little nit picky right now.

yea its more like a swamp cooler but with less humidity.. none the less man they work and thats "OK" in my book...

I agree even its only a few degrees, it cant hurt.

there was one that i saw that dropped the temp 12degress.. it wasnt one with the coil on the fan those just cool a few degress.. this one had a ice chest full of ice and a blower in top.. with this method you can also add dry ice and it would last longer and it would add co2 to your room

Hell yeah. Im thinking about getting some more dry ice. Last time I threw some in my tent, my plants perked up grew noticeably overnight.

yea dry ice is good when your plants need a little pick me up.. im picking up my co2 generator this next week from a friends house so im not gonna stress the heat ever again..

a nice post with that fan/ac, looks like if you used just one larg container for water and added ice, you could use a small fish tank water pump and drain back into the same container. would cool things down a bit more and last longer.