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Cpurola's first indoor grow, alot to learn.

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Cpurola's first indoor grow, alot to learn.

cpurola 1,795 Replies 118,674 Views
Page 42 of 90 · Replies 821–840 of 1,796
#821
Here is a quick Google search that looks to be a bit higher than what I read but perhaps conflation with CO2 runs.
I remember 45 in deep flower.
 
#822
cpurola said:
Found an interesting study in my google searching.
Moving away from 12:12

View attachment 2583561
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Although the two high-THC lines showed similar increases in growth and flower biomass with increased photoperiod, a strong decrease in cannabinoid concentration eventuated once the photoperiod was extended beyond 12L. As a result, Hindu Kush showed no significant differences in total cannabinoid yield between treatments as the increase in flower biomass (39%) almost perfectly matched the decline in THC concentration (40%) when comparing 14L to 12L. For Northern Lights, gains were less than for Cannatonic but still significant, resulting from the 14L < 12L treatment not having a flower biomass reduction compared to 14L or a cannabinoid concentration reduction compared to 12L, leading to a net gain of around 50%. For Cannatonic, it is possible that extending the photoperiod even further may also further increase yield, although it is more likely that maturation issues similar to those seen in the high-THC varieties will limit further gain.

Our results showed an almost doubling in yield for Cannatonic when the lighting was set to 14L for the first 28 days of flowering and then 10L for the remaining 29 days, which equates to the same total number of lighting hours as a 12L:12D cycle. This finding illustrates that a progressively reducing photoperiod can have substantial impacts on yield for certain specific genetic backgrounds with no additional inputs required.
 
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#823
JIMKSI64 said:
Here is a quick Google search that looks to be a bit higher than what I read but perhaps conflation with CO2 runs.
I remember 45 in deep flower.
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I asked for your research, you said you researched those particular strains. I am familiar with the academic research that already exists I was just not aware you actually performed your own. If you have then I would like to see it.
 
#824
Also my little tiny autos with no leaves are at 40 DLI and and 32 rate with reductions at 9 pm
Quick search finding that is clearly in the middle for autos.
I did not read the article. Much like counting your grams per watt yield I do not think you base it on highest settings used rather average. Perhaps the contents of the text explains this low number.

I do know that running 18/ 12 for a photo will require a more auto level of lights due to DLI.
 
#825
grayoldnproud said:
I asked for your research, you said you researched those particular strains. I am familiar with the academic research that already exists I was just not aware you actually performed your own. If you have then I would like to see it.
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And then you will post your research?
Please.
Much like researching auto technology under the theory and operation section of a workbook I have not researched by measuring every single main journal thrust bearing allowable clearance.
I used published articles from university level and commercial growers.
I can also use my own photo grow of White Widow that finished at 65,000 lux with a converted DLI in flower of 45.
 
#826
grayoldnproud said:
Is that published? What was the optimal DLI for those strains?

Then try your own experiment under what you consider to be optimal lighting for these strains. See if you get an improvement or not.
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My next sciencey grow is running 4 photos at 12 12 in flower and 1 at 18 12 in flower. Same environment same nutes.
O and a feed schedule I did not make up.
 
#827
JIMKSI64 said:
And then you will post your research?
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Nice dodge but I am not the one who said "I have researched those". So you didn't actually research it? You grew it based on what published information you chose to use. Nuff said. It's all good.
 
#828
JIMKSI64 said:
And then you will post your research?
Please.
Much like researching auto technology under the theory and operation section of a workbook I have not researched by measuring every single main journal thrust bearing allowable clearance.
I used published articles from university level and commercial growers.
I can also use my own photo grow of White Widow that finished at 65,000 lux with a converted DLI in flower of 45.
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watch out for lux it almost doesnt detect red light gives weak numbers for it.
 
#832
grayoldnproud said:
That will be interesting.

I'm not following this though. ??
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Okay guys I did not wish to start an argument just posting interesting information to ponder.
The study I posted was using photoperiod plants and may not track with Autos.
Plus, it's one study, only after a few more can the results be embraced fully.
 
#835
Grownsince95 said:
I don't know who pays y'all's electric bills but my new obsession is trying to see just how little I can get away with and still have flower I like to smoke. Thank God my standards aren't that high anymore! 💚
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i mean its not really that expensive what do you get less than a dollar for a gram.
but maybe it will interest you.you can do veg with 12h light as well just have to shine an hour of light in the dark period to keep her veging
 
#837
PlumberSoCal2 said:
"...in Cannatonic, all treatments starting with 14L:10D led to a significant increase in the CBD concentration, which led to a 50–100% increase in total CBD yield."

Horry sheet! I need to dive into this study😉
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i keep telling people most if not all hybrids will start flowering under 14/10,,
weeks 1-4.. 14/10
weeks 4-8,. 13/11
weeks 8- finish 12/12,..
sativas
weeks 1-6.. 13/11
weeks 6-finish.. 12/12,.,
 
#838
amneziaHaze said:
i mean its not really that expensive what do you get less than a dollar for a gram.
but maybe it will interest you.you can do veg with 12h light as well just have to shine an hour of light in the dark period to keep her veging
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that’s botany 101,.. 12 hours light and one hour light during darkness,.
12+1,..
 
#840
GNick55 said:
i keep telling people most if not all hybrids will start flowering under 14/10,,
weeks 1-4.. 14/10
weeks 4-8,. 13/11
weeks 8- finish 12/12,..
sativas
weeks 1-6.. 13/11
weeks 6-finish.. 12/12,.,
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Ive done it and Ive seen people do it in the forum, and Im pretty sure youve done it too. For me though, it delayed harvest to gradually diminish light during flower starting from 14/10 and I saw no significant improvement so I keep going with 12/12 for the swap. That said Ive only done it twice, both with hybrids but one sativa dominant and one indica dominant. Of course more time means more growth, they stretched more, if that counts as more production (for me it doesnt because I usually lollipop anyway, my light is not good enough to give me good lower buds).
 
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