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Mcgolan

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I have a couple of month old plants suffering from the same issue. They all are getting brown spots that get crispy. It seems to start basically anywhere on the leaf and eventually kills the whole leaf. Any ideas of what it could be? Can't find anything like it online...

Medium: 1/3 Promix BX, 1/3 Coco, and 1/3 Perlite
Nutes: GH flora trio and CalMag (around 1ec @6ph w/ runoff @5.5)
Light: Mars Hydro 2000 on 50%
RH: About 60% (lowered from About 70%)
Temp: 65-70f20210517_154515.jpg20210517_154518.jpg20210517_154526.jpg
 
65f-70f is too low temp for led. If your situation allows, bump it up to 80.

If the root zone is too cold, it can make the plants nutrient uptake out of whack. Which can present itself as a nutrient deficiency.

Lower leaves discoloring indicates a mobile nutrient deficiency.

I use GH Flora series and Botanicare CalMag+. In veg I use 5mL veg + 5mL micro +3 mL CalMag per gallon of tap H2O with good results.
 
Tracker said:
65f-70f is too low temp for led. If your situation allows, bump it up to 80.

If the root zone is too cold, it can make the plants nutrient uptake out of whack. Which can present itself as a nutrient deficiency.

Lower leaves discoloring indicates a mobile nutrient deficiency.

I use GH Flora series and Botanicare CalMag+. In veg I use 5mL veg + 5mL micro +3 mL CalMag per gallon of tap H2O with good results.
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I don't think temp has to do with it I have a sweet tooth gorilla glue that had 65 on and lights off about 55 and she is happier than can be. Fan leaves bigger than are heads. Happy environment. And I also have LEDs.
 
ZuuTeD614 said:
I don't think temp has to do with it I have a sweet tooth gorilla glue that had 65 on and lights off about 55 and she is happier than can be. Fan leaves bigger than are heads. Happy environment. And I also have LEDs.
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Yeah I just had a harvest that was doing just fine from January that dipped to 58°f at times and they turned out great. They probably aren't wrong to some extent but I don't believe this is my problem. Just did a flush and my starting ph came out to 5.3 with an EC of 2 for some. I'll get the hang of watering (or lack of) someday. I also think I straight overloaded calmag because I read my feeding chart wrong.
 
This baby late veg was seeing 48-52 degrees at night just 2-3 weeks ago we had a few nights get to 36 degrees my tent is in my garage. 4" AC infinity Exhaust fan with 67 remote I keep 1 flap open and I mess with intake fan I suck fresh air from my house about 4 to 5 speed when lights off to keep humidity down and low speeds when my lights kick on. But look how healthy she looks with cold nights. First time LST as well!
 

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ZuuTeD614 said:
This baby late veg was seeing 48-52 degrees at night just 2-3 weeks ago we had a few nights get to 36 degrees my tent is in my garage. 4" AC infinity Exhaust fan with 67 remote I keep 1 flap open and I mess with intake fan I suck fresh air from my house about 4 to 5 speed when lights off to keep humidity down and low speeds when my lights kick on. But look how healthy she looks with cold nights. First time LST as well!
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Dang! That's unbelievable! There really is no perfect science
 
There's not man but there is because the slightest over water or to much nutes it can ruin all or to much light or to much humidity. But it's easy science. Kinda lmao
 
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