Not Again!!

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New grow,
Gorilla Glue Seed planted May 23rd.
PH 6.4
Feeding started June 20th

Problem: Weird spots on leaves

Medium/grow method: Using Coco Loco, treating like soil.

Feed: and supplements used: Advanced Sensi Bloom 1 and 2.

water source: Tap ph's at 6.5

Strain/age: Gorilla Glue 4.5 weeks old

light used: Mars Hydro TSW200, and an Autocob in a 4x4, one plant only

Climate:81 F 34% humidity, ACinfinityfan on high. I might move the lightdrivers to get it a bit cooler, but it cools off at night.

Additional info:
Im not sure whats going on but i seem to have all sorts of issues, I fed this plant at week 4 ONLY. 4ml/gal of Sensi 1 and 2. Thats it, nothing else, after a few days I started seeing this, only seems to be on some leaves, not all. Im not sure what this is, I hardly fed the plant at all, I thought Coco Loco has amendments in it till week 4? Should I have not fed it that soon? Help :)
 

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So I'm running a similar coco/soil blend and ran into issues also. I expected I would as I have not seen a coco/soil layered grow go well. If it's anything like the mix I've got, and the description looks so, you may want to pick up AN Sensizyme. If you're putting in soil nutrients, I was explained that the coco will hold onto and essentially clog up everything.

Coco and soil nutrients are different and separate lines for most companies, AN included. So if you're using the AN soil line in coco I'd not be surprised by nute issues.

Zyme should help get things moving again. It does not effect pH or PPM so you can add it to whatever you've been using.

 
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That's a very low RH for 81 deg. I would consider potential deficiency caused by stomata closure. No transpiration, no transportation of nutrients. See attached. HTH, FWIW, IMHO, YMMV, etc.
 

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If you want to treat your medium like soil; why don't you use soil? What your doing does not end well. The coco is collecting salts, the plant has reached lock-out levels of something and like already mentioned the RH is too low. The leaf looks more like a P-K problem?
 
If you want to treat your medium like soil; why don't you use soil? What your doing does not end well. The coco is collecting salts, the plant has reached lock-out levels of something and like already mentioned the RH is too low. The leaf looks more like a P-K problem?
If it's a P-K problem could he lower the pH and help the plant take up some of the potassium? My understanding is that potassium is taken up at a lower pH of around 6.0.
 
If you want to treat your medium like soil; why don't you use soil? What your doing does not end well. The coco is collecting salts, the plant has reached lock-out levels of something and like already mentioned the RH is too low. The leaf looks more like a P-K problem?
Coco loco is a coco mix, its not actually pure coco and its supposed to be treated like soil. Im moving the drivers out of my tent tonight so that should take care of any heat issues. Thanks for the reply.
 
Whoever uses this stuff, should I have added calmag into my water from the get go? I cant seem to find info on that, and that might explain my issues.
 
Whoever uses this stuff, should I have added calmag into my water from the get go? I cant seem to find info on that, and that might explain my issues.
Calmag is used from the beginning of the grow to the flush. Some brands require you to discontinue its use two weeks before the flush. The info for what your using will be on the side of the bottle dude
 
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