Hydro grow using 420autoflower method
- Thread starter Whosweetlou
- Start date
103 days shes getting the chop tomorow
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Chop day! 4.01 pounds wet no trim
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The key to a large cannabis crop is to give it a lot of light. This is repeatedly the finding of cannabis research and I've been using 1kµmol light levels for years. The results are that I routinely exceed seed sellers yield estimates, usually by 50% or more and I consider less than a pound from my plant to be a failed crop. I have no particular talent in growing-prior to growing cannabis, I'd never grown anything except old (I'm 68).
Disclaimer — there is no question that cannabis will yield a good crop at 600+ µmol in flower. A lot of growers have grown a lot of good weed at the conventional wisdom ("legacy light levels") of 100-300 in seedling, 300-600 in veg, and 600+ in flower.
There is also no question that, as long as light is the limiting factor, cannabis will thrive in ambient CO2 at "800-1000" µmol. Depending on what research you read, cannabis yield increases in a linear/amost linear manner.
The ability of a cannabis plant to process light via photosynthesis matures at about week 5. (ChatGPT says week 4). You were on the right track at 900µmol but at 18/6, you were taking away "feeding time"—light is how a plant makes food and cannabis plants don't need lights out time to do "dark cycle processing". I have run 24/0 for many of my grows but also drop to 21/3 or 20/4 to, as Bugbee says, "give the a little rest".
I run my plants (photos in veg and autos) at 70-80DLI which is about 1kµmol. Photos in flower get that amount of light but with a 12 photoperiod.
When I starred growing in 2021 (I did one grow in 2017), I followed the legacy light levels and started learning about how cannabis reacted to light. At that time, the research available was from Bugbee, though DeBacco, also on YouTube, packages Bugbee's finding in a more straightforward manner.
The Chandra paper was interesting but conflicted with what I thought Bugbee was arguing. The paper that convinced be was the Frontiers paper (attached) which was conducted to address and issue in the Chandra paper (search for "plasticity" in the Frontiers paper).
In past the three years, more research has become available and the results are consisent—as long as light is the limiting factor, a cannablis plant will thrive in light levels up to about 1000µmol. Crop yield and crop quality* increase, as light levels increase. Bud quality increases as light levels increase, though the impact rolls of below the light saturation point.
Autos benefit in the same way that photos do. My first large crop was gelato autos from Nirvana. That came in at 17 ounces from the larger plant (I sometimes grow two plants in my 2'x 4' but it's tough because autos can get really big when grown in higher temps and given lots of light).
There are some nuances to it but, in the words of Autopotamus:
46:00
"As long as you give them as much light as they possibly can take, they will grow huge. They don't need darkness."
*crop quality is the ratio of the mass of flower to the above ground mass
Disclaimer — there is no question that cannabis will yield a good crop at 600+ µmol in flower. A lot of growers have grown a lot of good weed at the conventional wisdom ("legacy light levels") of 100-300 in seedling, 300-600 in veg, and 600+ in flower.
There is also no question that, as long as light is the limiting factor, cannabis will thrive in ambient CO2 at "800-1000" µmol. Depending on what research you read, cannabis yield increases in a linear/amost linear manner.
The ability of a cannabis plant to process light via photosynthesis matures at about week 5. (ChatGPT says week 4). You were on the right track at 900µmol but at 18/6, you were taking away "feeding time"—light is how a plant makes food and cannabis plants don't need lights out time to do "dark cycle processing". I have run 24/0 for many of my grows but also drop to 21/3 or 20/4 to, as Bugbee says, "give the a little rest".
I run my plants (photos in veg and autos) at 70-80DLI which is about 1kµmol. Photos in flower get that amount of light but with a 12 photoperiod.
When I starred growing in 2021 (I did one grow in 2017), I followed the legacy light levels and started learning about how cannabis reacted to light. At that time, the research available was from Bugbee, though DeBacco, also on YouTube, packages Bugbee's finding in a more straightforward manner.
The Chandra paper was interesting but conflicted with what I thought Bugbee was arguing. The paper that convinced be was the Frontiers paper (attached) which was conducted to address and issue in the Chandra paper (search for "plasticity" in the Frontiers paper).
In past the three years, more research has become available and the results are consisent—as long as light is the limiting factor, a cannablis plant will thrive in light levels up to about 1000µmol. Crop yield and crop quality* increase, as light levels increase. Bud quality increases as light levels increase, though the impact rolls of below the light saturation point.
Autos benefit in the same way that photos do. My first large crop was gelato autos from Nirvana. That came in at 17 ounces from the larger plant (I sometimes grow two plants in my 2'x 4' but it's tough because autos can get really big when grown in higher temps and given lots of light).
There are some nuances to it but, in the words of Autopotamus:
46:00
"As long as you give them as much light as they possibly can take, they will grow huge. They don't need darkness."
*crop quality is the ratio of the mass of flower to the above ground mass
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