Light cycles for reducing mid-day heat

Billy the Mountain said:
Are you blind as well?

"Growth will slow after ~30°C leaf surface temp, a little higher w/ supplemental C02"

~ is the tilde character

I'll leave it up to you to figure out its meaning
Click to expand...

Trolls gonna troll, not worth the effort. The poster has an obvious history of a specific style of troll, which is a pseudo-scientific gish-gallop technique. Not gonna change, and appears to have gone on for a good long time.

A good tip off that he's not even trying to have a good faith discussion is to step into a thread posted and responded to in English and drop some photos of a German textbook. Hands up, who here in this thread speaks/reads German?
 
Another example is using BIG SCARY SOUNDING scientific and latin terms improperly.

For example, take this: How many million or billion years has phyllogenetics put chloroplastide genes conserved/stable in evolution?

By definition, Phyllogenetics is the study of evolutionary genetic relationships between organisms. If you can find me someone who's been studying plant genetics for millions or billions of years, I want to meet that person and have that discussion because that study has been going since before recorded history. Last I heard there isn't a research facility that goes back a billion or even million years.
 
One might further assume that if were going to discuss the chloroplast genetics and reactions to environmental stress, we'd also have to make a distinction in the three larger divergent haplotipical populations and then also discuss the implications of crossbreeding, since they obviously react differently to environmental changes (lookin' at you ruderalis, vs. sativa & indica).

All of this is entirely not worth discussing since the OP asked what amounts to a 'beginner question' and diving into the deep end of the pool really was never intended to help them, and more just a way to throw lots of mud on the internet.
 
Kassiopeija said:
link please
Click to expand...
www.ilovegrowingmarijuana.com

Best Temperature for Growing Cannabis Plants by Stage

The ideal temperature for growing marijuana plants is between 68° Fahrenheit and 77° Fahrenheit. Learn how to regulate grow temperature here.
www.ilovegrowingmarijuana.com www.ilovegrowingmarijuana.com
"Marijuana plants won’t usually die from being too hot, but their growth can slow from it. High external temperatures (above 80 degrees) while flowering will not only slow down bud growth but also reduce their smell and potency. If you care about growing buds with plenty of cannabinoids, you need to be sure the external temperature is kept under control during the flowering stage. "

Hardly the extreme "reduce growth at 45°C" or 113F which would fry the plants quickly I think @Kassiopeija but please cite a translation of your German research? Does that book even refer to Cannabis?
 
Overgrowtho said:
www.ilovegrowingmarijuana.com

Best Temperature for Growing Cannabis Plants by Stage

The ideal temperature for growing marijuana plants is between 68° Fahrenheit and 77° Fahrenheit. Learn how to regulate grow temperature here.
www.ilovegrowingmarijuana.com www.ilovegrowingmarijuana.com
"Marijuana plants won’t usually die from being too hot, but their growth can slow from it. High external temperatures (above 80 degrees) while flowering will not only slow down bud growth but also reduce their smell and potency. If you care about growing buds with plenty of cannabinoids, you need to be sure the external temperature is kept under control during the flowering stage. "

Hardly the extreme "reduce growth at 45°C" or 113F which would fry the plants quickly I think @Kassiopeija but please cite a translation of your German research? Does that book even refer to Cannabis?
Click to expand...

Lots aim at the range of 75f-85f (24C-29C) for our grow environments, but up in the low/mid 80's during light time if we're using modern LED lighting. Note that you won't really know what your plants leaf surface is hitting without measuring that, but it's probably a good guestimate to subtract 2 to 3f degrees or so to come up with that number. The thing about temps in flowering is that high temps will burn off/evaporate the more volatile terpines...but the more delicate of those do start to go at 70ish f, and most are good up to ~100f.

The thing you have to think about though, is that once you start cooling your environment your plants will slow their growth and development, so...is it worth dropping the temps that far, or just riding it out.
 
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