COLD stress

This time of year, many indoor grow areas in basements and such should be having some issues with keeping the temperature above 50 degrees. I know in my garden it is a real issue, and usually this time of year I get some stress showing up. Not much I can do about it unless I could heat the whole basement, but cannot.

I am thinking if I go down from a 750 cfm fan to maybe in the range of 350 cfm in the winter my temps will stay warmer? Anyone got any info or opinions related to reduction of air flow to increase temp? Already have a space heater in the veg room for nights along with heating pads. Not heating the flower room other than what it gets from the veg room.

Opinions?

I flower in a 12 x 8 outdoor shed, and right now it's 31 degrees f. (outdoors, lol) I use a small heater to heat the shed...and since heat rises...I use a fan near the roof that blows the warm/hot air directly down on the ladies. Shed stay's closed during the night with no ventilation, but I still provide plenty of circulation.

Keeping the pots off of the cold floors is a must, also. Setting them on a blanket, plywood or milk crate helps keep the roots from getting too cold.

Try to keep the highest/lowest temps within 20 degrees or so. Don't let the high temps get to the 80's if the cold temps get down to 50's. The wider the temperature spread, the more it stress them out.

Any lower than 50ish and virtually all growth stops. (or at least get's painfully slow)

My flower room is 5x8 with concrete wall on one side that is below ground level. My ground temps have plunged and thusly even with the heater I cannot keep my night temps up and even days have trouble with the lights on....like I say 750 cfm

I could insulate the wall, but that is my summertime air conditioner and keeps it cooler. I am kinda thinking that reducing the air turnover I get warmer temps. My circulation is overkill for the size of my grow.

That is why I am considering a smaller fan for winter. I hate to waste money tho.....

Wow, 31, pretty cold for AZ

Edit:Ya nothing is on concrete, all is on wood or some other elevated device.

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Originally Posted by Rusty Trichome

I use a small heater to heat the shed...and since heat rises...I use a fan near the roof that blows the warm/hot air directly back down on the ladies. Shed stay's closed during the night with no ventilation, but I still provide plenty of circulation.

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That's the best I can offer, except for perhaps adding a heater.

I was just looking into this as I'm having a little bit of trouble too... what kind of temps are you seeing?

I only get up to about 65-75 ambient during the day... under the lights it's probably 75 or so (I hope). At night I'll dip down between 55-60. I think 56F is the lowest I've seen. Sounds like that's probably not a problem though as I'm guessing you guys are having lower temps and doing alright?

I thought I noticed one of my Sativa strains' fan leaf stems redden up pretty much overnight recently...

i grow in an outside shed also...it is well insulated but with LED's i run an oil filled electric radiator heater to keep my temps up...but i also got a variable speed controller for my fan so i can turn it up or down depending on my humidity...so i keep it as low as i can to keep as much heat in as possible..and my outside temps are in the 20's right now and my room is in the 80's

We run 4 ten gallon tubs in flower and each has a 50 watt fish tank heater. they can be adjusted to 68f. We have an A/C in the wall running constantly.
The room is always 72f. We are having a cold winter and bad temp swings.
20's at night and 50 to 65 days. Soon it will be 40's at night and 75 to 85 days.

We got the heaters way back cause we were surpised by a night the rez got below 50f. The next day plants just drooped and fell over.

Well at least we should all have some beautifully-colored nugs!

Well now that i have a few ladies in a cold room (50 degreesF) I decided to not use any ventalation because of it dropping the temps. Also I've read that opening your door, window, shed once a day for the time you work and admire the ladies is enough for them to breath.

As for the fan why go through the hassle of buying/selling and getting a weaker fan, when I'm sure you can buy a fan speed controller.

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Originally Posted by WashougalWonder

This time of year, many indoor grow areas in basements and such should be having some issues with keeping the temperature above 50 degrees. I know in my garden it is a real issue, and usually this time of year I get some stress showing up. Not much I can do about it unless I could heat the whole basement, but cannot.

I am thinking if I go down from a 750 cfm fan to maybe in the range of 350 cfm in the winter my temps will stay warmer? Anyone got any info or opinions related to reduction of air flow to increase temp? Already have a space heater in the veg room for nights along with heating pads. Not heating the flower room other than what it gets from the veg room.

Opinions?

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i would buy a queensize heating blanket fold in in half and put it under the plants.thats what i did and it has helped alot.then you can control what temp you want.as far as the room goes get a heater that has a timer on it set it for 4 hours or so at the peak of the night cycle. if you are running 2 rooms then you could stagger the light cycle and pump the heat from the lights in each room with lights on.

Quote:

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Originally Posted by superskunk1

Well now that i have a few ladies in a cold room (50 degreesF) I decided to not use any ventalation because of it dropping the temps. Also I've read that opening your door, window, shed once a day for the time you work and admire the ladies is enough for them to breath.

As for the fan why go through the hassle of buying/selling and getting a weaker fan, when I'm sure you can buy a fan speed controller.

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i have been running the intake fan only with lights on set to a timer to go off 30 mins b4 lights out to kindda heat the room up b4 lights go out.you also need a duct damper so when fan is off air is'nt creeping in on ya.