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Fatjoe

Fatjoe

Well-Known Member
kushmaaan said:
to each their own, I dont exceed 250 ppfd for early veg then 450 for veg and early flower 550 then i up it week by week till i reach no more than 700 for the rest of flower, sure i need to move my light up an inch or two to account for the stretch that happend in the last day or two but overall my parameters work pretty well for me.
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What your doing is working well. I come with no advice. None needed..lol. Ya did a great job in figuring out that plant. Often scenarios like this end badly..not so here.
 
K

kushmaaan

Member
medidedicated said:
This a timeline of what made me go from .8ec to 1.7ec. It was pale looking and dying out in leafs. It then got darker realizing if you feed 8x a day when it doesnt dry back for it.. It got much darker but its not doing that as bad with less frequency at 4x a day. Now with big fans it drys back enough for 8x a day again so now its fine.

Being in water Id think its similar and why people go lower ec in dwc if I paid attention to their ec I dont recall I usually avoid dwc threads its tough method to me. I cant even keep a tub of water with out plants in it that rot imagine with plants.
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Thats insane how similar our plants reacted to “normal” EC, in dwc i think the whole thing about going as low as possible is to save nutrients because “why add more if the don't need it” but my girl here very well showed she needed it, anything lower and she starts showing signs so ima stick to my guns there lol. Your plants look amazing tho!
 
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kushmaaan

Member
Fatjoe said:
What your doing is working well. I come with no advice. None needed..lol. Ya did a great job in figuring out that plant. Often scenarios like this end badly..not so here.
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I really appreciate it! Not to say that i don't like advice, i just dont think its cool when random people on the internet act like they know my exact situation better than me, telling me “your using excess light for your stage of growth”, when i never said how old my plant is nor how long shes been flowering, and i have my light put up further than the manufacturers recommendation, keep a PAR meter near my tent for checks daily, keep my lights dimmed to nearly 50%, as-well as leaf temps ALWAYS being 73-75, too much light my ass lol i could really give em more if i wanted to. Again tho really appreciate the positive comments dude and wish you well!
 
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GreenGenez421

Well-Known Member
Wastei said:
Do you take EC/pH reading before topping off the reservoir? EC will probably be borderline high with that high EC input and the small size of the reservoir?

14 inches from the canopy seem way to close in my book. Leaves having a matt look while being fed that EC gives me the indications of using excess light for the stage of growth.

I would try to dial down light intensity until you're able to feed properly for the stage of growth. Don't focus on hitting DLI numbers and that shenanigans, focus on the plant response and what the plant tells you to do and forget everything else starting out.

Cheers!
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For sure! Completely agree with everything.
The matte papery leaves are indicator #1. Healthy fans should have a supul sheen.
 
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kushmaaan

Member
GreenGenez421 said:
For sure! Completely agree with everything.
The matte papery leaves are indicator #1. Healthy fans should have a supul sheen.
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IMG_8851.jpeg
What do you mean when you say matte and papery? the leaves seem like they’ve got some shine when i use flash on my camera, i didn't use flash in my other pictures and without it the pictures look kinda dull, and they feel slick and moisturized i guess for lack of a better word.
 
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GreenGenez421

Well-Known Member
kushmaaan said:
View attachment 5445706
What do you mean when you say matte and papery? the leaves seem like they’ve got some shine when i use flash on my camera, i didn't use flash in my other pictures and without it the pictures look kinda dull, and they feel slick and moisturized i guess for lack of a better word.
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I see a couple in the background that would be more on the ideal end of look and feel. It's almost like comparing hydrated healthy skin to dull skin lacking hydration. Probably a poor example, but the "matte/ papery" I speak of can be felt when you gently rub with your thumb.
 
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Delps8

Well-Known Member
kushmaaan said:
to each their own, I dont exceed 250 ppfd for early veg then 450 for veg and early flower 550 then i up it week by week till i reach no more than 700 for the rest of flower, sure i need to move my light up an inch or two to account for the stretch that happend in the last day or two but overall my parameters work pretty well for me.
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The numbers that you've posted will result in a good yield but I suspect that your plant isn't able to reach its potential at only 550. The only number I've seen for lowest PPFD you want for flower is from "de Bacco University" on You Tube and, IIRC, he puts it at 600µmol.

The standard value I've seen for the light saturation point for cannabis is 800-1000µmol, strain depended but I routinely grow cannabis, autos and photos, at 1k and the biggest issue I have is keeping my plants from getting too big.

Cannabis is a light whore thrives under high light conditions and yield has been shown to increase in an almost linear manner. The yield estimate for cannabis, not surprisingly, consists of just one input — the amount of light that a grow receives over the life of the plant. As light increases, plants can generate more glucose and that allows them to grow faster. Of course, this is as long as light is the limiting factor. I've been growing at 1k±mol for three years and have found that the upper limit for my grows is about 1150µmol. I grow in hydro and my grow is I an unheated garage in Southern California with CO2 levels of about 450ppm.

In terms of gradually increasing light - there's no need to do that, insofar as the plant is concerned. Growers seem to be, generally speaking, reluctant to increase light levels and my thinking is that's because growers think that plants react to increased light in the same way that athletes increase their fitness level, that is adding a little more "load" and then getting stronger as a result of recovery.

Plants don't function that way. Once they've reached a certain stage of growth, they're able to handle a certain amount of light. In flower, for example, cannabis can thrive at 1kµmol, in ambient CO2. If the plant is at, say, 600, there's no particular reason to not go from 600 to 800 and then a day later go to 1k. Of course, not every grow environment is such that a plant can thrive at that level but the way the you've describe your grow, it sounds like it's in pretty good shape.

I'm starting my fourth year of growing and I stayed with the 600µmol (or whatever) limit at first and it wasn't until, IIRC, year two that I followed the advice of what researchers had found instead of sticking with conventional wisdom. The increase in yield is consistent and significant. I'm not doing anything magic. I'm just feeding my plants well.

There is a lot of research on this but the easiest to follow, most concise source source that I've found is the You Tube videos that Mitch Westmoreland released a year ago in which he discusses some of the research that he conducted while working toward his PhD. He's a PhD candidate under Bruce Bugbee and he lays out his case in an easy to follow manner. Highly recommended.
 
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