Light stress?

Rj5562 said:

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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270 on both

Rj5562 said:

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.”””

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hmmm, vpd

Splinter7 said:

hmmm, vpd

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My vpd was near 1.4 before Now it’s fluctuating between 1.0-1.3

I’m going to say light intensity is the main cause of your symptoms. For reference I experienced the same exact symptoms at the top of my highest plant, that I measure distance from. My light (AC Infinity EVO4) was a full 24” over tops, but as the tallest grew up to within 19” of the light I saw some very slight whitening and tacoing of the newest top growth. Even with light only on 50% intensity currently. So I have raised the light up to roughly 22” over tops, just 3” higher, and kept the same 50% intensity. No more damage and they are all super happy and praying up. I do see some slight nutrient burn on some tips there, but I have exactly the same amount on some not an all plants. I know the are all getting the proper diet of organic dry nutrients too too dressed every month. So in a nutshell, the way organic breakdown slowly, they will get what they get, no more or no less. I use Gaia Green Grown and Bloom (not pretended) at the recommended one tbsp per gallon of pot size. Set it, and forget it! Currently still vegging at 70/30 grow to bloom ratio. I use plain ph’d water at 6.2, always adding a ml or two of calmag for the LED intensity and 1-3ml of silica. They are strong and loving it.