Fluctuate temperature during grow cycle? ¿

Kzad-bhat

Member
From the crazy recesses of my mind come all sorts of stupidity. But I sometimes pull an Einstein-Bradbury out of the cats hat. And I'd like some opinions about it.
Most growers keep their temperatures as stable as they can throughout the plants cycle, but ages back, someone who remains nameless, or at least unpronounceable, started to think about what happened if you stopped keeping the temp stable and deliberately adjusted it to mimic nature. Well.... After killing way more plants that was sensible, they noticed that when the temp fluctuated, but not by a great deal, the outdoor babies started to put on their big girl blouses and start to fatten in advance of the approaching winter.
So they set up a few rooms with clones from the same mother in each room.
By looking at a weather chart, they noticed the temp went up until mid-late afternoon then down until just around sunrise. So they set their controllers to increase the day temp up to 3 degrees Celsius higher around the 9 hour of light time in a 12/12 and to drop by the same hitting the lowest temp just as the lights and having their coffee before work.
Then they went crazier and noticed that the tides seem to do the same. At times the tides rose higher, sometimes lower so they factored that in as well.
This was all too much for their comprehension so they got hell baked, then did it again just because they could, then they made the 3 become a 2 at times to coincide with the local tide times.
Being of such powerful and scientific minds, they then promptly forgot to write down any of it and had to work it out again.
So instead, they found out that if you dutch out a 3 bedroom house, take the bloody budgerigar outside first! It recovered, but only sort of...
Being remorseful, they gently placed the bird outside, taped the door up again and got back down to business.
Through all this turmoil, they still do this fluctuation in their grow rooms and consistently turn out bud better that anyone else when growing genetically identical plants, same nutes, same lights etc...
Yes, a sudden temp change can destroy your plants, but a gradual one, mimicking both outdoor temp and tides does, in their opinion, work. And my opinion is identical if not better. Taste, smell and potency all improve.
Have any of you tried this yourselves?
 

Covert Cannabis

Active Member
Listen man, people will go on and on all day ab doing this and that but the truth is the simpler you make things the better the outcome will be. Just keep your plants between 70-75 degrees Fahrenheit, 20-25% humidity and all will be fine. Now I would recommend getting a dimmable grow light to simulate a natural light cycle! Just make sure you water every 10-16hrs depending on when its needed and have some sort of fan causing a little bit of turbulence as that will strengthen the plants roots and branches. That's all man, don't overthink it.

~edit~

also make sure your plants are getting a good source of nutrients, I reccomend a combo of rose food, molasses and seaweed diluted in water, works great!
 

OzyM8

Well-Known Member
Listen man, people will go on and on all day ab doing this and that but the truth is the simpler you make things the better the outcome will be. Just keep your plants between 70-75 degrees Fahrenheit, 20-25% humidity and all will be fine. Now I would recommend getting a dimmable grow light to simulate a natural light cycle! Just make sure you water every 10-16hrs depending on when its needed and have some sort of fan causing a little bit of turbulence as that will strengthen the plants roots and branches. That's all man, don't overthink it.

~edit~

also make sure your plants are getting a good source of nutrients, I reccomend a combo of rose food, molasses and seaweed diluted in water, works great!
Surely you’re not serious.
Please research VPD (vapour pressure deficit) and understand it before giving advice to people.
70-75f & 20-25%....pffft.
 

Covert Cannabis

Active Member
Surely you’re not serious.
Please research VPD (vapour pressure deficit) and understand it before giving advice to people.
70-75f & 20-25%....pffft.
Sorry I was high, I meant a 40-60% humidity vegetative, 40-50% flowering, 70-80 degrees is ideal for growing Cannabis, I've been doing this for 8 years man I'm just telling you what I've discovered
 

OzyM8

Well-Known Member
Sorry I was high, I meant a 40-60% humidity vegetative, 40-50% flowering, 70-80 degrees is ideal for growing Cannabis, I've been doing this for 8 years man I'm just telling you what I've discovered
I’m not trying to be a smart ass with you. Number of years growing is irrelevant, although it does amuse me when it gets mentioned, kind of like a dick swinging contest.
Seriously though, research VPD and then understand it’s relationship on growth stages. It will assist you become more informed and better indoor grower, where conditions can be controlled.
 

Covert Cannabis

Active Member
Yeah man no you're good, and I know what pressure deficit is so there's no need to educate me, again really high, I understand 80 farenheit can only support 40-45% humidity, my bad... the pots messing with my brain. I only grow indoors for a month before moving outdoors and don't dive straight between the lines. At the end of the day the plant is a plant and so long as you supply water and nutrients you'll be successful (in most circumstances)
 

OzyM8

Well-Known Member
Knowing what VPD is and understanding it maybe two seperate things here:
Let’s just assume a LST adjustment of 0 on ambient for this. In veg at 80f you’d want RH around 70% not 40-45%. In flower at 80f high 50’s to mid 60’s.
Never underestimate the power of education, no matter what you think you know.
Enjoy your high :peace:
 
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