Don't switch straight to 12/12 according to new study

[Situation420]

My room stays a constant 72 degrees day and night. My plants have never been happier! Dropping your temps was once thought to be critical aspect of indoor growing but since been proven to be a myth. Considerable differences in temps at any time is not good for any plants, this is just common sense but having to drop the temp? BUNKIM...total myth...spend your money on humidity control because this is the main concern on any indoor grow when the lights go out!

True but here is how day/night temperature differences work. During the dark period it is best to keep the temp within 10 degrees F of what you ran during the day, anything over that will cause slower growth, stem elongation, and delayed flower ripening. Plants that are kept at a constant temperature are more likely to grow stouter sturdier stems and have denser bud growth. Plants that have large temperature differentials between the day and night suffer from stretching and slowed growth rates. This is a known fact. Anyone that has grown for years can tell you just from basic observation that once they added that AC unit to their grow room to drop the day temp to 82 from 87 or even 90, while the night time temp remained the same they got denser buds and less stretching between nodes.

Also all this talk about thermoperiodism, all that word means is the study of relative day and night temperatures and how it affects plant growth. Go look at what they are actually studying and the results they are obtaining. That 20 degree difference is terrible advice. Even in the natural environment that is a radical swing.

 

[Impman]

True but here is how day/night temperature differences work. During the dark period it is best to keep the temp within 10 degrees F of what you ran during the day, anything over that will cause slower growth, stem elongation, and delayed flower ripening. Plants that are kept at a constant temperature are more likely to grow stouter sturdier stems and have denser bud growth. Plants that have large temperature differentials between the day and night suffer from stretching and slowed growth rates. This is a known fact. Anyone that has grown for years can tell you just from basic observation that once they added that AC unit to their grow room to drop the day temp to 82 from 87 or even 90, while the night time temp remained the same they got denser buds and less stretching between nodes.

Also all this talk about thermoperiodism, all that word means is the study of relative day and night temperatures and how it affects plant growth. Go look at what they are actually studying and the results they are obtaining. That 20 degree difference is terrible advice. Even in the natural environment that is a radical swing.

The effect on an organism of the rhythmic fluctuation of temperature, including responses associated with thermal changes accompanying the alternation of day and night. That is the definition you lazy mofo. Do a real search on it instead of posting Jorges NOGrow bible bullshit

 

[Situation420]

I dont even read jorge cervantes. I just watch his videos on youtube when im high. That day/night temperature differential is what i learned from a buddy of mine that is a bio-engineering grad student that could probably explain how this all works way better than me. To bad he doesnt smoke treefer but he loves plants!

 

[Situation420]

The effect on an organism of the rhythmic fluctuation of temperature, including responses associated with thermal changes accompanying the alternation of day and night. That is the definition you lazy mofo. Do a real search on it instead of posting Jorges NOGrow bible bullshit

LOL your saying the same thing as me just adding a bunch of unnecessary wording. So u got a link to a site where i can see a study done thermoperiodism? I would be interested in reading it

 

[Uncle Ben]

I live at exactly 30 degrees lat and about 15 minutes from the Coast. I think I would prefer a pure sativa, but anything that would give me a decent veg period would be great! PM me if you need more details, lol. I don't really like sharing info on here

I'd stick to the usual mutt for outdoors growing at that latitude.

 

[Impman]

LOL your saying the same thing as me just adding a bunch of unnecessary wording. So u got a link to a site where i can see a study done thermoperiodism? I would be interested in reading it

http://staff.washington.edu/raista/photoperiodism.pdf

 

[Impman]

In some organismsthermoderiodsplay an important role in the phase setting of
circadian rhythmicity. Plants; such as, chrysanthemum and tomato respond to
alternating periods of low and high temperatures.& will flower earlier if
subjected to low night and high day temperatures. Diurnal temperature
differences influenceinternodelength, plant height, leaf orientation, shoot
orientation, chlorophyll content, lateral branching and petiole and flower stalk
elongation (Moe et. al. 1995).
I submit marijuana is thermoperiodic because I've seen it best and worse case.

 

[Uncle Ben]

LOL your saying the same thing as me just adding a bunch of unnecessary wording. So u got a link to a site where i can see a study done thermoperiodism? I would be interested in reading it

I gave you a link. Are you blind?

Sheesh, another noob that has to taught botanical principles.

UB

 

[NietzscheKeen]

Now now guys....

 

[Impman]

Screw with your light cycle, do a 1 week of darkness, drive a nail through the stalks, add nothing but potash for flowering and inject CO2 at 400-1000$ a grow cycle. This is Internet Marijuana growing at its finest .... ' dude, my plants are thinking'. I will sell you a stick I made. It keeps lions away from your marijuana plants. I have never seen a lion near my home or plants. PM me for the lion stick... its 600$. Ill throw in a bottle of Alien Bloom Bubble Berry Booster

 

[Situation420]

I gave you a link. Are you blind?

Sheesh, another noob that has to taught botanical principles.

UB

lol i read your link UB and it was for chrysanthemums and the effects on temperature and plant growth not thermoperiodism. Impman give me a few min let me read your article i just saw u posted. You seem to at least understand what is important when it comes to the effects of day/night temperatures and how they effect plant growth.

 

[Situation420]

Impman I just tried to read your article and all I got is that the leaves droop more when its colder at night making it harder for photosynthesis to occur more efficiently. I've noticed that before when watching time lapse videos of weed plants and the leaves always go up and down when it comes to night and day. I am going to read the article more tomorrow because I gave up after the 2nd page cuz I spaced out. My thoughts on this, the maximum amount of energy received from a light source is when a leaf is perpendicular to that source, by increasing or decreasing that angle photosynthesis is not as efficient as it could be. If temperature causes more droop in the leaves meaning it takes a longer time for the leaves to to reach that perpendicular angle, the more time the leaves are at a less optimal angle. To me this means that the rate of photosynthesis is less efficient when the leaves are not perpendicular for the most amount of time the light is on. I really believe this is the only important face of day night temps. Maybe the other stuff is too but i dont see a direct connection.

 

[Uncle Ben]

lol i read your link UB and it was for chrysanthemums and the effects on temperature and plant growth not thermoperiodism.

You obviously didn't read the article. It's about thermoperiodism as it relates to photosynthesis, respiration, growth. For the sake of discussion they quoted various plant materials. Spin it anyway you want but nature provides a drop in temps when the sun goes down. duh......

$650 for snake oils and believing a high night temp is a good thang......and so goes the membership of Troll It Up.

 

[Uncle Ben]

Impman I just tried to read your article and all I got is that the leaves droop more when its colder at night making it harder for photosynthesis to occur more efficiently.

Huh? Where in the hell are you coming up with this crap?

 

[Situation420]

Huh? Where in the hell are you coming up with this crap?

If you read what I said above it has nothing to do wit any of the articles just my own observations and the physics of light angle intensity.Why you tryin to catch me while Im sleeping? I'm goin back to bed.

 

[Situation420]

You obviously didn't read the article. It's about thermoperiodism as it relates to photosynthesis, respiration, growth. For the sake of discussion they quoted various plant materials. Spin it anyway you want but nature provides a drop in temps when the sun goes down. duh......

$650 for snake oils and believing a high night temp is a good thang......and so goes the membership of Troll It Up.

If you read what I said above it has nothing to do wit any of the articles just my own observations and the physics of light angle intensity.Why you tryin to catch me while Im sleeping? I'm goin back to bed.

Also, my B. I just looked back and noticed you posted an article on what causes stretch UB. I didn't read that either and will when i get up.

 

[Uncle Ben]

http://staff.washington.edu/raista/photoperiodism.pdf

Adds credence to me only growing spinach and dill during the fall/winter.

 

[skunkd0c]

True but here is how day/night temperature differences work. During the dark period it is best to keep the temp within 10 degrees F of what you ran during the day, anything over that will cause slower growth, stem elongation, and delayed flower ripening. Plants that are kept at a constant temperature are more likely to grow stouter sturdier stems and have denser bud growth. Plants that have large temperature differentials between the day and night suffer from stretching and slowed growth rates. This is a known fact. Anyone that has grown for years can tell you just from basic observation that once they added that AC unit to their grow room to drop the day temp to 82 from 87 or even 90, while the night time temp remained the same they got denser buds and less stretching between nodes.

Also all this talk about thermoperiodism, all that word means is the study of relative day and night temperatures and how it affects plant growth. Go look at what they are actually studying and the results they are obtaining. That 20 degree difference is terrible advice. Even in the natural environment that is a radical swing.

in winter time my plants can go from 80-85f lights on to 55-60f lights off i do not provide any heating once the lights are off
i do not see any detectable slowing in growth rate, just a few more colourful buds due to the colder conditions

peace

 

[skunkd0c]

Impman I just tried to read your article and all I got is that the leaves droop more when its colder at night making it harder for photosynthesis to occur more efficiently. I've noticed that before when watching time lapse videos of weed plants and the leaves always go up and down when it comes to night and day. I am going to read the article more tomorrow because I gave up after the 2nd page cuz I spaced out. My thoughts on this, the maximum amount of energy received from a light source is when a leaf is perpendicular to that source, by increasing or decreasing that angle photosynthesis is not as efficient as it could be. If temperature causes more droop in the leaves meaning it takes a longer time for the leaves to to reach that perpendicular angle, the more time the leaves are at a less optimal angle. To me this means that the rate of photosynthesis is less efficient when the leaves are not perpendicular for the most amount of time the light is on. I really believe this is the only important face of day night temps. Maybe the other stuff is too but i dont see a direct connection.

This seems to change through the growth of a plant, during veg around 3-5 weeks this is when i most notice plants
sleeping , they start to droop at 15+ hours of light
the leaves actually straighten themselves out before the light comes on maybe 2-3 hours before the lights come on the leaves are already waiting to receive the light

i do not notice the drooping/sleeping much at all during flower
early veg it is not so evident either
this is one of the reasons why i think any amount of light past 16+ hours does little for the plant during veg
other than keep it warm for a bit longer

peace

 

[Uncle Ben]

in winter time my plants can go from 80-85f lights on to 55-60f lights off i do not provide any heating once the lights are off
i do not see any detectable slowing in growth rate, just a few more colourful buds due to the colder conditions

peace

The colder temps simulate winter coming on and adds to the flowering drill. Probably speeds things up too. Plant knows it needs to quickly complete what its been programmed to do before being nailed by a frost.