if you knew how elaborate my venting is you’d laugh my fan pulls air out top past lights then pushes it through hollow side wall and back up into unit through floor the endless cycle is only reason they are even that warm. the ambient where the grow box is under 40f and tented in around them once I exit that tent it’s 20f
I am just a stubborn sod only reason they are still alive
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Yeah, I germinate my seeds up in the loft, we are on solar and wood stove, its winter here…
I can’t get the temp much past 70 during day when stove is going…
At late night when the stove goes out I got barely 50 up there…
They all seems to be fine , including my tomatoes, just a little slow…
Its a good training for early outdoor crop…
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I’m super new, starting seedlings inside to transplant outside in spring. I’m keeping their room really consistently 65. Would it be better to let the temp drop overnight? Get them accustomed to fluctuating temps they’ll have in nature?
Lost one when the light timer failed – she looked awesome at 11pm, dead at 6am. 
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Very often we forget these plants are weeds and that they can and will adapt to a lot a temp swing helps them prepare for night and day difference in temps they grow best in high 70’s 76-78f and grow very slow as temps drop into lower 60’s
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Yeah, mine were stretching like crazy, so I upgraded my light, moved them closer so they’d get more leaves, and lowered the temp to slow them down. They are slow, but looking good.
I don’t mind if they’re slow – my goal is strong roots by April so they’ll survive a transplant outside. Is slow growth bad for them?
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Actually slow growth makes them root more the cooler temps mean some nutrients are less avail so plant compensates by hunting harder for them in Hydro cold is an enemy since roots are exposed between netpots and nutrient solution to frigid air
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Hurray, not doomed! That’s very helpful, thanks.
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@Fever I have a grow journal going on. Super Excited Newbie Here - #36 by BIGE It’s a little dull, but I’ve had some issues to work out. Mostly high humidity, heat/light burn, and now my ph is too low. It is my first real grow-- I’ve attempted before, 20 years ago, but they all died two weeks from seed. I just put this current plant into flower yesterday. I’ve never had a pot plant live this long, so I’m pretty excited. 
Oh, and yeah, there is definitely a couple of posts about damaged leaves, and trying to move on, focused on new growth. 
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Exactly, mine will be ready to deal with low 40’s at night, that’s what they are getting early in the morning from the day they germinated…
I be placing them outside soon as the snow melts