white spots, yellow leaves

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tagametHB

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This is my second grow. First one barely made it. My first crop showed these same signs. When I recently moved a few girls into the flower chamber they all but died. My PH is 6.5, I've backed off the nutes to about 2/3 suggested feeding. I am getting ready to moved these girls over but want to know what causes these white spots? They tend to evolve into the yellow/brown state within a few weeks. Ideas/thoughts?

My set up is a 4 tube CFL on 24hr, DWC feeding fox farm. Notice there is no direct air on the plants - should I change that?

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im not the expert but i would check for bugs , and if no bugs , then i would check my humidity , is there even a fan in the room ?, if the humidity goes up high at night and then low at day you could get mildew , check temps , look at roots , wouldnt hyrt to flush and then start over fresh , the ph is higher than i like to use , i stay between 5.5 and 5.9 , are you using tap water ? might have a mineral deficiency dont know cause i dont use fox farm
 
To me it looks like a deficiency of some sort maybe calcium, magnesium or iron, I had that look to a couple of my leaves on my Utimate Indica I added some Cal-Max and the problem cleared up, the Ultimat Indica love the magnesium so I give it some with every watering and haven't had a problem since, If you find this is your problem grab some Cal-max! Also check for spider mites they can make a leaf spotted but to me your problem looks more like a dificiency problem, just my opinion hope that helps!

Phatpharmer
 
Your ph is too high.
Check this chart http://www.marijuanapassion.com/forum/attachment.php?attachmentid=1833&d=1141100090

It looks like your doing hydro so you can see you want your ph to be around 5.8.
Not saying that i know that is whats causing your plant issues but your ph is definitely too high ;)

You can see on that chart that at 6.5 in hydro the plants not even getting some of the nutes like calcium etc so would be a pretty good explanation for em looking defiant :)
 
Agreed, NB has told you exactly where your problem is, easy to fix with PH down ;)

:peace:
 

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