my theory would be that you can flower successfully under 4/4, 6/6 or 8/8 light cycles

[Observationist]

I have seen growers post about trying to shorten up nights and stay in flower - no reveg. While there is no hard fast rule and strains matter, in general anything under 10 hours full dark seems to be problematic. Plant health and other factors apply...

I can't help thinking there are so many other ways to tune the grow that clearly work, this one seems less appealing to attempt. I need to go back and read the solo cup thread, not clear to me if observationist tried this and succeeded or not. Can anyone demonstrate success with something like 4/4 or 6/6?

Have not in flower....yet...

does work in veg.

 

[Aqua Man]

Have not in flower....yet...

does work in veg.

Yup definitely will work in veg and if the spectrum ratios are done right it may… just maybe give some benefit…. as i said earlier we are not there yet in terms of the science that shows it definitively. Rather a lot of theory and bias observations is where we are as of yet.

in truth i strongly think even if we were there that the benefit would not be worth the effort

 

[Aqua Man]

That's what I wanted to see.

This is known as metabolic rate… and all plants not some are effected by environmental stressors such as light, temp etc. this is why we have ideal plant temps, ppfd ranges, nutrien ratios etc

 

[GreenGalaxyFarm]

No its dependant on the hormon florigen produced from light cycle periods not spectrum. Afaik unless you have some new updated science im unaware of

really trying to do complete research but everything i find end up being inconclusive or focus on human study not plant..
''phytohormones respond differently to spectrum-associated regulatory effects'' is where im at,when I know more...
for now only that florigen is involved in signalling flowering there are much more hormones at play

 

[KenKenaf]

''phytohormones respond differently to spectrum-associated regulatory effects'' is where im at,when I know more...
for now only that florigen is involved in signalling flowering there are much more hormones at play

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4306306/

 

[GreenGalaxyFarm]

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4306306/

nice find
vernalization
''To monitor the seasonal progression and to time their reproductive development, plants must be able to sense and remember environmental cues such as temperature. The process by which plants use a prolonged cold period – winter – to promote flowering is known as vernalization''

 

[GreenGalaxyFarm]

so no evidence that less than 8 hours lights on (4/4 and 6/6) accelerates primordia formation
spectrum and temperature with 8/8 on may still work?

 

[GreenGalaxyFarm]

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4306306/

“There is a well-defined network of receptor proteins and transcription factors that mediate ethylene signalling in plants. This ethylene signalling pathway promotes circadian rhythms by acting on the clock-regulating genes, GIGANTEA, which is also regulated by sugar.

“We found that ethylene reduced the circadian period, but this effect was blocked by sugar.”

''.. there are other ‘clocks’ that respond to longer time-scales, like seasonal cycles, and these long-term ageing processes, which are heavily influenced by ethylene, could be impacted by disruptions to circadian clocks.

“By manipulating these we could fine-tune development rates to optimise crop yields or shelf-life,” he says.

“Bananas, for example, are cut green to reduce damage during transport and then shipped around the world. Once they reach their destination, they are often sprayed with ethylene to ripen them.

from: https://pursuit.unimelb.edu.au/articles/the-chemical-that-tells-plants-when-it-s-time-to-sleep

 

[legitness]

What the bloody hell is going on haha everyone seems to know what’s happening

You run 4 on 4 off all day ?? Why do ya get 4days growth in 1 day or summing lol

 

[durbankid]

why just why 12/12 for flower anything longer for veg
i have never been to another planet where the sun sets and rises every 4 hours
i really think some have way to much time on there hands and by the sound of it too much lsd taken