Can you acclimate plants for more light?

KonopCh

KonopCh

Well-Known Member
Can you? How?

My girls are the biggest to date, but I think they're receiving not so much light. 140W on DC side, 180W at AC side in 80x80cm tent, 50cm above net. 17.000 LUX at SCROG net and slightly more higher on. DLI below 25 Mol/d.




And then after 16 hours of light, they look saturated...




But in my opinion, 140W for that big plants is nothing. Especially at that distance!

Just before anyone says they're overwatered or something else... I have eliminated and tested other factors and I am pretty sure it's light saturation. Btw, they're autoflowers.

So, my question is: can you acclimate plants for more light? How?
 
KonopCh

KonopCh

Well-Known Member
mahiluana said:
:peace: Get your lamp closer to your babies - or/and add a second lamp.

Take some pics of your light source and tell us more about chips and lenses... spectrum ?
Click to expand...
As you can see, this is not correct answer... as plants quickly turn up leaves (tacoing) to protect themselves.
 
D

Dave455

Well-Known Member
KonopCh said:
Can you? How?

My girls are the biggest to date, but I think they're receiving not so much light. 140W on DC side, 180W at AC side in 80x80cm tent, 50cm above net. 17.000 LUX at SCROG net and slightly more higher on. DLI below 25 Mol/d.




And then after 16 hours of light, they look saturated...




But in my opinion, 140W for that big plants is nothing. Especially at that distance!

Just before anyone says they're overwatered or something else... I have eliminated and tested other factors and I am pretty sure it's light saturation. Btw, they're autoflowers.

So, my question is: can you acclimate plants for more light? How?
Click to expand...
30,000 lux plus would be better !!
 
thetr33man

thetr33man

Well-Known Member
You have about 21 watts / square foot. If you are running a good light this is around the minimum required to produce decent results. Plants should be able to handle 50k lux easily, according to my phone sunlight around noon is around 180,000 lux where I live. I dont think the lighting is causing your issue tho, more likely environmental or nutrient based.
 
wietefras

wietefras

Well-Known Member
If your plants for some reason ended up with underdeveloped roots then they will not grow as large as normal either.

If anything, I'd agree with the others that it's more likely that they are not getting enough light though. 17k lux is more like a minimum.

Also, during the vegetative phase plants adjust to their environment. They can adjust things like the size of the leaves and number of stomata.

Perhaps they have simply adjusted to what you give them. It's normal for plants to decrease in efficiency after mid day.
 
lukio

lukio

Well-Known Member
wietefras said:
underdeveloped roots
Click to expand...
this.

i totally agree with this...its something ive only just realised and am currently suffering with some girls in veg.
i never rooted them out properly. Under flouros theyre fine but under the quantums on 100w and they droop...been driving me mad!
 
Randomblame

Randomblame

Well-Known Member
KonopCh said:
@Dave455 yea, rock on! Turn those 150.000 LUX on!!
Dude, seriously, did you read what I wrote?
Click to expand...
Did you try to flush one or two of them as I recommended in another thread?

With autopots they get bottem feeding, right? Maybe the roots don't reach into the deeper zones enough because the upper half of the substrate is amost dry in autopots. As far as I know plants in autopot system need a few top feedings untill their rootsystem is grown to the lower area.
It's worth a try and would also fix a possible nutrient lock-up as well. At least it can't hurt if they were not over-watered before.
 
KonopCh

KonopCh

Well-Known Member
@thetr33man @wiete yea, I know they should handle 50.000 LUX. And that is my question - how can I acclimate them to handle that much light? As you can clearly see that they look saturated after 16 hours on 17.000 LUX.

Overall I am happy with their size, but I want more light which will obviously turn into more buds.

@Randomblame yea, everything is in check. Roots are big now at 50 days. Pots are wet from top to bottom. I actually dig into roots previous grow and they are amazing, big and airdome is full of them.
 
Randomblame

Randomblame

Well-Known Member
Hmm! What is left then? Maybe related to too much nutes or not enough airflow. Most automatics does not need much nutes but it could be also strain depending.
Automatic genetic needs not as much light because they are adapted to their natural enviroment. Also when crossed with sat./ind. genetic some recessive genes can come thru and make them sensitive to too much light.
For this run I would change the light regime to 16/8h and observe your next run and try regular or fem. seeds. Hopefully this problem does not occur with "normal" genetics.
 
KonopCh

KonopCh

Well-Known Member
@Randomblame it's strange, yes. But this will be my personal best, I don't doubt.
They're filled whole my tent like never before. If I get 300g from them like last time (but I guess it will be waaay higher), this would be 2,15 GPW.
I know GPW is not optimal meassurment, but I can compare my grows with it.

Anyway... I just want they "eat" more lumens... My light go to 220W on DC and I am using only 140W.
 
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