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sudden death ??

I am truly stumped !! This crap happened almost over night ! The only thing I did different on this grow was to add a little Silica to my feeding /watering regiment. I'm in air pots , in Coco , not over watered . Cal Mag , of coarse .....PH at runoff is 6.2 . Grow area is dialed in etc.....I am truly stumped. zoom in

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Replies (9)
    • Looks like nute burn any remote way could be a cutworm or maybe termites in root system

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      • Looks either too wet or too dry...Does not resemble nutrient burn to me...

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        • CORRECTION: silica RAISES pH..   Seeing the wilting made me say root rot but i looked at it again and im more inclined to say overwatering

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          • the thing about coco is that you kinda cant overwater

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          • Did you mix the silica in a solution with other nutes, or add it separately? I don't know much about growing in coco, but for DWC I would add the silica at half the recommended dose as the first ingredient in the mix. By the time I added everything else the PH would balance out (at about 5.8 for DWC) 

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            • at least on the bottle silica is the first thing you should add when mixing nutes

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              • I usually put the silica in the water first then wait 15 to 20 mins to mix in well with water. I did not do this a long time ago and I had s fall out reaction and it screwed my plants up and they ended up like this. I always shine a flashlight when mixing to watch for this( i mix in a black bucket dwc makes it hard to see if mixing well. You can see the fallout happen if you mix wrong. 

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              • Damn Steveo these aren't lookin good ! It must be the silica. I don't use silica but my guess is it's antagonizing other nutes. Flush good, if they're regs I'd putum in veg until they recovered. Your yield is pretty much lost right now. I found this.... Can I use too much Silica? Yes. Too much silica can lead to a buildup of salts and cause nutrient lockout and root damage. Symptoms of silica nutrient lock include browning or burning on the tips of the leaves, reduced or stunted growth and low yield.

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                • Good information. 👍

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