Cellar temps

[Hopswolf]

I grow in my basement and filter air from the 2nd floor in which usually ends up around 63 F . I have been having to run 23 hrs on 1 hrs off because I dont want it to cool down from 80 F to 63F because it will effect growth. I believe 18-6 would be ideal for the plants and my pocket . I'm wondering if I can get away with that much of a change in temp. Or if I'm better off just doing what I'm doing now.
Thanks for any responses ..

 

[Olderfart]

Temp is only part of the issue, you need to deal with humidity too. VPD charts are your friend.

in any case, a few hours at lower temps may not hurt as long as RH does not get too high. OTOH, growth will be slower at lower temps.

I stayed at 24-0 in my grow due to the temp/RH issue. Now that RH is down due to colder weather, I am 20-4 to get some color from lower temps.

 

[bad dragon bzzz]

the change of temp isnt an issue,its the temp range.dont know what 63f is but plants tend to slow down growing at 17c or less.
in a tent in in the open ? insulation,of any kind be in cardboard boxes,bubblewrap,50mm kingspan.get the tent off the floor.
good lck n keep er lit

 

[Hopswolf]

I have a sheet of 1/2" insulation under the tent w no extra clearance to get it off the ground any more than that .
Ty guys for the replies...cheers

 

[Death The Cultivator]

A brief overnight cold won't be a problem. In the winter my tent runs at 86f with a heater and drops to 68f with lights off. Cold nights minimize stretching, while the metabolism is slowed at colder temperatures it doesn't harm plants in nature and cannabis has a fast metabolism.

How is your humidity? You don't want large fluctuations in environment or it can breed problems. I tend to stay at 40% rh in my veg tent but my temperature is 84f/66f.

 

[Hopswolf]

Thanks Damien50,
My rh is usually in the 30's. I think I may try to do 20 on/4 off. I believe it will help the plants with a descent rest period to make their buds larger.