Aolelon
Well-Known Member
Pretty much exactly this post...
LED Strip Thermal Paste
- Thread starter lawlzcake9000
- Start date
Randomblame
Well-Known Member
Keep your humidity in check too, mate. Maybe it's way to low which cause a too high VPD. Should be around 55-60% for good and healthy growth.
Slinging PAR
Well-Known Member
In a pinch you could also use liquid paper. A lot of it. But if you had a few cases available to you at no cost I think you could come up with an easy way to apply. Oh wait, I think some students may already have.
boilingoil
Well-Known Member
I'm good on the watering habits. Same problems in my main veg room with sisters taken at the same time when switched to the LEDs.
Same sisters again under MH.
boilingoil
Well-Known Member
My main veg room is at 72 degrees and between 55-60 RH. I will say that the round 1 gal pots are filled with happy frog and that the first pic I posted is 5 days into 12/12. The plants under the MH are in coir which is my main medium I've used for the past 10 years on my indoors. All pics are of GG#4.
Slinging PAR
Well-Known Member
What if your leaves are warmer than ambient? How does that swing the chart?
Also what about altitude? Atmospheric pressure is a significant factor.
All the other forum crud aside, can you help others with the answers seeing as they all will have different environments.
Aolelon
Well-Known Member
I have my LED's 12 inches away from my plant and they look exactly like your MH post. I use led strips and quantum boards (which have the same diodes as the strips I'm using.)
Aolelon
Well-Known Member
Can you? Seems like all you like doing is trolling people on posts.
boilingoil
Well-Known Member
yes, that's what these are under. The flowering ones are under 8 3ks running at 200 watts. The veg lighting is a mix of 4k, 3.5k and 3k at 200 watts.
Slinging PAR
Well-Known Member
Yes but it is an opportunity for him to do some research and figure out what it all means. Then he can share it with the rest of you and the discussion continues.
boilingoil
Well-Known Member
boilingoil
Well-Known Member
Yes, except they have struggled from the time they were transplanted into the Happy Frog so that might be part of the problem too. They looked good for the first 3 days after transplant but immediately thereafter started struggling with a Cal and mag issue enough that they had to be fed some. They recovered from the cal dif. and perked up some but they never had the flat leaf surface.
Aolelon
Well-Known Member
Ive also noticed purple stems under my LED, but it could be due to deficiency as 1 plant is affected more than another so I cant be 100% sure its due to the light.
Slinging PAR
Well-Known Member
Temps? Lights on and off. Cooler at dark usually brings out the color.
PSUAGRO.
Well-Known Member
Idk then, strange....... maybe up your temps under the leds, see if it improves?
Randomblame
Well-Known Member
Where do you measure the humidity? Can you hang a sensor directly on canopy height between the tops? I would also check the canopy temeratures. They should be about 2-3 ° C below the ambient temperature. Do they look the same all the time or just at the end of the day?
For some reason they are oversaturated and have closed the stomata, which can have different reasons.
Too much water or too much light, too less fresh air, low humidity, soil EC too high,
At first I would hang the lamp higher and use a fan to supply the small girls with more fresh air(and CO²).
You say they are not overwatered..maybe rinse them once and let the pots dry completely(you can try it at first with half the plants to see if it helps).
No fertilizer until they recover! Maybe a light foliar application (eg. with kelp extrakt) or try something with beneficial bacteria like mammothP. Or give them some compost tea with 2 tbl spoons molasses at the end of the rinsing.
I once had the same problem and I had several factors together. For one, the air around the plant was too dry and there was not enough air flow, which disturbed the leaves when breathing, and the soil was overloaded with fertilizers (EC + 3,5mS). After I flushed them and provided a higher humidity with good air-flow thru the canopy and raised the light a bit higher, the symptoms disappeared within a week.
You can not do much more right now. Sometimes it can take a few days to adapt to a new spectrum, but that does not seem to be the case here because they vegged under COB's too.