Light stress?

Rj5562

Member
Okay I upgraded my 100 watt ac infinity ionboard in by 2x2x6 tent with the 240 watt s33 ionboard a few weeks ago. I’ve been running it at 100% intensity at about 20in from the canopy. There were no tacoing leaves throughout that time. Just this past week I’ve notice the top new grow is all starting to taco. I’ve ended up raising the light to about 30 in above the canopy and decreased intensity to about 70-80 percent so that I’m still in the target ppfd range for the plant. Still having the taco leaves. It’s not heat stress the temp in my tent never goes above 76degrees and humidity is constantly maintained at 50%. Do you think the light is just too powerful for this tent? Or could it be the reflection off the Mylar from the bigger light is just more intense? I don’t want to keep dropping my intensity not and not be in the ideal ppfd.
 

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Rj5562

Member
also thinking that maybe the light is just too powerful for my small tent and maybe need a co2 supplement in the tent? Any advice helps
 

Rj5562

Member
Also growing in sohum living soil. Been watering with 6.5ph and adding fish shit to each watering, used recharge once about 2 weeks ago. Ph the water then add fish shit and ends up around 6.6-6.7 No added nutrients other than those two since the seed popped.
 

Rj5562

Member
Yep, they are getting fried by the light intensity, no doubt about that
That’s what I thought. Much appreciated, i dimmed down the intensity to 40%. See how she reacts the next few day. Would you say this is like a mild case of it? I have seen worse on other threads. Just don’t want to damage my plant any further. Also new to growing so any advice helps here.
 

BenGman

Well-Known Member
Yeah it's mild and it will recover no worries, just go easy on her for abit and don't do that same setting again, do less

Happened to be once just at the beginning of flower!! I freaked out man..but they still came up killer :)
 

Rj5562

Member
Yeah it's mild and it will recover no worries, just go easy on her for abit and don't do that same setting again, do less

Happened to be once just at the beginning of flower!! I freaked out man..but they still came up killer :)
Yeah I’m in my second week of flower, freaked out a little as well lol that’s why I came to this forum. But I lowered the intensity to 40%, light sits about 24 in from top now and par meter reads just under 500. Definitely won’t be running this light that high again. Thanks for the help
 

RIS

Well-Known Member
Im on this train… I’m almost certain I’m dealing with the same issue.
Do you agree? It’s only on the tops and new growth. Some older leaves have lightened in color to a pale green.
Stems starting to turn purple. It’s gelato so I wouldn’t expect it too
 

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PadawanWarrior

Well-Known Member
Okay I upgraded my 100 watt ac infinity ionboard in by 2x2x6 tent with the 240 watt s33 ionboard a few weeks ago. I’ve been running it at 100% intensity at about 20in from the canopy. There were no tacoing leaves throughout that time. Just this past week I’ve notice the top new grow is all starting to taco. I’ve ended up raising the light to about 30 in above the canopy and decreased intensity to about 70-80 percent so that I’m still in the target ppfd range for the plant. Still having the taco leaves. It’s not heat stress the temp in my tent never goes above 76degrees and humidity is constantly maintained at 50%. Do you think the light is just too powerful for this tent? Or could it be the reflection off the Mylar from the bigger light is just more intense? I don’t want to keep dropping my intensity not and not be in the ideal ppfd.
pH is my guess here.

Im on this train… I’m almost certain I’m dealing with the same issue.
Do you agree? It’s only on the tops and new growth. Some older leaves have lightened in color to a pale green.
Stems starting to turn purple. It’s gelato so I wouldn’t expect it too
Maybe micronutrient deficiency. Or it could just be needing more food with the intense light.

Just my guesses though.
 

PJ Diaz

Well-Known Member
Okay I upgraded my 100 watt ac infinity ionboard in by 2x2x6 tent with the 240 watt s33 ionboard a few weeks ago. I’ve been running it at 100% intensity at about 20in from the canopy. There were no tacoing leaves throughout that time. Just this past week I’ve notice the top new grow is all starting to taco. I’ve ended up raising the light to about 30 in above the canopy and decreased intensity to about 70-80 percent so that I’m still in the target ppfd range for the plant. Still having the taco leaves. It’s not heat stress the temp in my tent never goes above 76degrees and humidity is constantly maintained at 50%. Do you think the light is just too powerful for this tent? Or could it be the reflection off the Mylar from the bigger light is just more intense? I don’t want to keep dropping my intensity not and not be in the ideal ppfd.
Lots of tip burn in those pics, my guess is your feed is too high, not lighting.
Im on this train… I’m almost certain I’m dealing with the same issue.
Do you agree? It’s only on the tops and new growth. Some older leaves have lightened in color to a pale green.
Stems starting to turn purple. It’s gelato so I wouldn’t expect it too
This looks to be the opposite issue, feeding too low.
 

RIS

Well-Known Member
Lots of tip burn in those pics, my guess is your feed is too high, not lighting.

This looks to be the opposite issue, feeding too low.
What’s a reasonable ppm? All it’s feedings have been 2-0.25-2 Buddha grow
 

yosim

Well-Known Member
not lighting I don't think, look at the edges and the tips, early stage K def, maybe caused by a lockout as they seem green enough to indicate they are getting enough food
 

Rj5562

Member
Yeah it's mild and it will recover no worries, just go easy on her for abit and don't do that same setting again, do less

Happened to be once just at the beginning of flower!! I freaked out man..but they still came up killer :)
well aside from everything, it was a combination of too much light and too low of humidity, I removed the humidifier from the tent about 4weeks ago to start dropping the humidity, I threw it back in the tent last night, taco leaves corrected themselves, this morning I slowly increased the light intensity back up and have seen positive results from the plant. The thought hit me last night to when the leaves started curling which was about 3 weeks ago. So I did some research and threw it back in. Also my soil ph is too low as well, so have some stuff coming today to top dress for the next watering.
 

Splinter7

Well-Known Member
i have the same light. 2, one in each of my tents. i have on plant that i think doesn't like it at all...or it has some other issue. no issues on the other 6 plants. i am running full blast at about 16 inches. i also have a supplemental 100w of ABIcre red light in each. that is not too much light. no co2. how hot is your tent? the light gets hot. i found blowing a fan on the topside of it helps. also, it's not 240w.
 

Rj5562

Member
i have the same light. 2, one in each of my tents. i have on plant that i think doesn't like it at all...or it has some other issue. no issues on the other 6 plants. i am running full blast at about 16 inches. i also have a supplemental 100w of ABIcre red light in each. that is not too much light. no co2. how hot is your tent? the light gets hot. i found blowing a fan on the topside of it helps. also, it's not 240w.
My tent runs no hotter than 78f, I corrected my issues though so far, my humidity was to low in the tent, this was my last post describing it. I have the light now at about 30 in, at 100%, after I threw back in my humidifier the taco leaves subsided, thenleave became a noticeably darker green and I slowly increased the light intensity. Also my soil ph is low as well. It may be something different for you but that was my problem, tent was too dry and the light was burning up the top leaves



“”well aside from everything, it was a combination of too much light and too low of humidity, I removed the humidifier from the tent about 4weeks ago to start dropping the humidity, I threw it back in the tent last night, taco leaves corrected themselves, this morning I slowly increased the light intensity back up and have seen positive results from the plant. The thought hit me last night to when the leaves started curling which was about 3 weeks ago. So I did some research and threw it back in. Also my soil ph is too low as well, so have some stuff coming today to top dress for the next watering.”””
 

Rj5562

Member
i have the same light. 2, one in each of my tents. i have on plant that i think doesn't like it at all...or it has some other issue. no issues on the other 6 plants. i am running full blast at about 16 inches. i also have a supplemental 100w of ABIcre red light in each. that is not too much light. no co2. how hot is your tent? the light gets hot. i found blowing a fan on the topside of it helps. also, it's not 240w.
I haven’t bought a wattage meter yet, what watt does your run? I’ve read that it pushes about 270 actual
 
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