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I have them setting in crates. I can bring the temperature up. I have two big plants in there at the moment though. I can harvest them at anytime, checked trichomes today. The seeds have been in soil two days so chances are they haven't cracked yet. I will probably harvest the plants tomorrow so I can raise the temperature.
 
hell if its bad just grow in smaller tubs and buy soil heater cables. bury them in 10-15 gallons of soil each.plant a cable and dial it in just like a heating mat.i do this dance each year LOL especially since my woodstove finally crapped out on me. i am in the basement.cold air sinks.LOL freezing air is heavy LOL!
 
fully enclose temps at lights off to maintain any warmth in there with the heating mat. works well to maintain soil temp. soil temp is key usually.or hell completely swap your timer cycles backwards so its on at the coldest part of the days/evenings. i did that once,works well too.
My lights run 24/7. I cut my big fan off in the tent, that should raise temperatures enough. The fan is a big ass stand up fan it circulates so much air so that's one reason it's chilly down there.
I tried to give you some reputation as it's what I do when someone is helpful but I guess I've give. You some recently because it won't allow me to.
 
hell if its bad just grow in smaller tubs and buy soil heater cables. bury them in 10-15 gallons of soil each.plant a cable and dial it in just like a heating mat.i do this dance each year LOL especially since my woodstove finally crapped out on me. i am in the basement.cold air sinks.LOL freezing air is heavy LOL!

Oh hey, do you know of any fan controllers WITH a thermostat? I found this orange box like one on Amazon but I'm not sure if it's what I'm looking for. Basically I want to bring cool air in from outside but once temperatures reach a certain point I'd like it to shut off and turn back on when needed
 
some window fans have them and are cheap.dont know how accurate they are but in a somewhat stable environment I would imagine it would do fine for you. I know mine does when its spring or fall out to push fresh cool air in i set it half way and it turns off. LOL! but other than that no real experience with any others. dual window fans operate individually from each other(independent fans in and out going air) low medium and high 8 or 10" fans and would work well in a average 4X4 grow space imo. or bigger even smaller just set it lower or wherever LOL
 
fully enclose temps at lights off to maintain any warmth in there with the heating mat. works well to maintain soil temp. soil temp is key usually.or hell completely swap your timer cycles backwards so its on at the coldest part of the days/evenings. i did that once,works well too.
You have all types of useful information and ideas!
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Thanks,yeah I grow this way often thats why I know. lots of work,well for me with bad pain n stuff and bored to dead most days LOL! but i shift my tent around three times a year for weather related conditions to fully running my tent open too depends on what works LOL!
 
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