Cold temperatures while lights are off

[elfo777]

Hello.

Im growing indoors in a very cold house, temperatures can get as low as 55º fahrenheit while lights off. Winter is coming (heh) and im worried that it may kill my plants.

I was wondering if this is dangerous for my plants or cannabis can tolerate temperatures this low. I have a black ceramic heating bulb so I can use it to raise my temperature up to 60-65 while lights are off.

Is this enough or shall I be worried?

 

[Afgan King]

Just move it to 60° an your fine your gonna get some fall colors for sure if your in flower

 

[Michiganmeds1982]

Watch out for mold, mold love large temp swings from lights on to lights off

 

[BM9AGS]

My winter temps were similar. Had a good outcome. Granted it's not optimal

 

[PSUAGRO.]

run the lights at night..........or use autos,lol

 

[Gquebed]

Shoot for 65f at lights off. Below 60 and root growth will slow significantly and stunt bud growth.

 

[elfo777]

My winter temps were similar. Had a good outcome. Granted it's not optimal

May I ask what strains did you grow?

run the lights at night..........or use autos,lol

Yep I already do that, but still gets pretty cold at daytime. I live in the mountains so we can get temperatures under 30 fahrenheit.

Shoot for 65f at lights off. Below 60 and root growth will slow significantly and stunt bud growth.

Ok, I'll do that.

 

[Afgan King]

My winter temps were similar. Had a good outcome. Granted it's not optimal

Not optimal I purposely run 60° night 75° canopy temp with 35% humidity and kill it. Those are optimal conditions even with co2 trust that

 

[elfo777]

Not optimal I purposely run 60° night 75° canopy temp with 35% humidity and kill it. Those are optimal conditions even with co2 trust that

So I guess you haven't noticed any slow growth with those temperatures?

 

[Afgan King]

Shoot for 65f at lights off. Below 60 and root growth will slow significantly and stunt bud growth.

Any documentation of stunting bud growth I mean mine is consistently right now at 58°-61° room temp lights off like I want it and idk see any stunting ever this is day 53 of 63 lol

 

[Afgan King]

So I guess you haven't noticed any slow growth with those temperatures?

Opposite running 71° room temp with 75° canopy and then 61 at night but ac will push to 58 then let dehume till 61 then repeat. Never an issue buddy just pulled last crop same system as me 2.37 a light over 14 gavitas and 56 plants he runs 69 day 59 night

 

[Gquebed]

May I ask what strains did you grow?


Yep I already do that, but still gets pretty cold at daytime. I live in the mountains so we can get temperatures under 30 fahrenheit.


Ok, I'll do that.

Too many to list.

 

[Gquebed]

Any documentation of stunting bud growth I mean mine is consistently right now at 58°-61° room temp lights off like I want it and idk see any stunting ever this is day 53 of 63 lol View attachment 3787818

Verifiable fact = bud growth depends on root structure and lots of them.
Verifiable fact = root growth happens mostly during lights off.
Verifiable fact = cold affects root development.

No documentation of my own, but i run many strains regularly and ALL of them produced less when my lights off temps have dipped below 60f on a consistent basis.

 

[Afgan King]

Verifiable fact = bud growth depends on root structure and lots of them.
Verifiable fact = root growth happens mostly during lights off.
Verifiable fact = cold affects root development.

No documentation of my own, but i run many strains regularly and ALL of them produced less when my lights off temps have dipped below 60f on a consistent basis.

That's cool I've grown over 10,000 plants in a commercial setting for a huge concentrate company actually#1 in Colorado and my own grows for past 10 years and they/I run 58-61 night and 71 day time. I also run a lot of strains in fact in my basement right now have over 47. You wanna say 55 and lower shit even 57 cuz never pushed it there and can't argue it but 58-61 at night and 71 day is optimal. Btw we only got our bonuses if we hit 2.3+ lbs per light in rooms of 180 plants with 45k watts lol

 

[Afgan King]

May I ask what strains did you grow?


Yep I already do that, but still gets pretty cold at daytime. I live in the mountains so we can get temperatures under 30 fahrenheit.


Ok, I'll do that.

Here's what I can think of in my basement off too of my head right now

2 jesus og
2 Jilly 1 candy cut, 1 Canadian cut
2 gg4 1 original, 1 s1
Mothers tongue
Tahoe og(clone only)
Florida og (clone only)
The white og(clone only)
Guava
Guava chem
Buford og
Purple drank(clone only)
Purple urkle
Afghan Kush
2 sonic screwdriver
Cuvee
Pura vida(clone only)
Mothers milk
Wookie
24k
Kandy Kush
Golden eye(only one with it 24k x faceoff og)
Lemon alien
Buddha's delight
Durango og
Alien blues
Cornbread
Dog cookie (forum cut gsc x Star dawg)
Star glue
Bubba kush(clone only)
Strawberry cough
Flo
Grape god bud

 

[Afgan King]

Oh plus 4 new crosses
Lemon alien male x
Pura vida
Kandy Kush
Sonic screwdriver
Gg4

 

[Afgan King]

@Gquebed none of that was meant to come off mean or cynical or anything I been dabbin all morning lol

 

[Gquebed]

@Gquebed none of that was meant to come off mean or cynical or anything I been dabbin all morning lol

No worries. No offence taken. Our expeiences are different as our environments are. Humidity and elevation may play a role. And medium. Maybe its different for hydro. I grow in soilless...

 

[Afgan King]

No worries. No offence taken. Our expeiences are different as our environments are. Humidity and elevation may play a role. And medium. Maybe its different for hydro. I grow in soilless...

I grow in tupur which is coco, perlite, bio char and compost

 

[8/10]

Plenty of posts, 1 or 2 actual suggestions as usual...

I have the same problem and I would love it if someone had a solution to this. I have used a small (pc fan sized) heater fan from ebay, which works okay, but I'm kind of hesitant to leave it on at night because fire hazard. An alternative might be using an aquarium heater in a water container, to serve as a small radiator. They are often variable and shouldn't be hazardous to leave unattended for hours.