Bright Yellow Patches & leaves Turning Down, & Some plants turning up! - Any Advice?

[Weedhound]

That's spot on perfect. Nope, that's not your issue then. How do the buds look. Like they'll be ready in a week?

[Weedhound]

2 questions

Does the problem seem limited to the plants and leaves closest to the light? If you look at the plant.....at the parts NOT directly exposed to the light are they normal? Or is it evenly on all they leaves regardless of where they are in reference to the light?

Are the plants still getting super cold at night? That'll getcha by killing off small roots.

[Weedhound]

Also I'd STRONGLY consider a good root product like Cannazym which will help stave off root rot until you can get them harvested.

[JonnyWiz]

Yeah the buds are looking good, first grow so nothing to compare them with but they are close to finishing, all trichomes are cloudy, no amber yet though (maybe a random 1 or 2)

we have 6 plants, 2 rows of 3 with the light in the the middle, the problem has occured on the front left & front right plants, not the ones so directly under the light (we have now raised it a little and seems to have stopped the taco effect on the leaves) and is happening all the way round the plant so pretty even

Yep temperatures are around freezing at night, although we have a portable oil style radiator in there on 24/7 im sure it gets cold still, damm battery in temp gauge has packed up, will replace and measure it properly tonight

[knna]

Although i agreed the initial Stinky's diagnosis, after knowing temps are 75/50 and the lamp 1ft away now i have doubts.

Now i believe its a micro's deff, likely Cu or Mn (or both) due the high ph. What do you think, Stynky?

Anyway, at this stage there is little to do, and its more a matter of curiosity :stoned:

[Weedhound]

Well if he can get the lower temps it it will definitely help.....other than that....I';dd add Cannazym just to make sure to keep the roots healthy and tough it out.

[stinkyattic]

Your pH is slightly low, but your REAL problem is that your plants are freezing cold- are they sitting on a cold cement floor? Cold soil will show MUCH MUCH worse lockout symptoms than soil at the optimal 70'F. Also, you are running MG soil.

To keep from spreading:
Stabilize temps at NO LESS than 60'F night!
Get pots up off cold surfaces
Withhold water- let the pots get rather dry between waterings, and improve pot drainage/root zone oxygenation.
FLUSH to bring pH to 6.8 with tap water. You also probably have fertilizer buildup from running a pre-ferted dirt plus liquids, so the flush will take care of both problems.

But your big issue is temperature.