Hi I am growing in clay pebbles with a hydroponic system. The PH is 5.2. PPM in range. They are almost 2 weeks into flower. Spots showed up on one leaf a while ago but didn't think much of it until it spread. First time grower by the way! I have 2 plants in this system and this one is much worse. One is seed I found and got lucky it's female, it is the one that has barely any spots. Almost none on that plant. The other is blueberry kush from seedsman. It is the one that is covered and a few leaves look rought (in picture). I suspect it is a calcium/magnesium problem and have added cal mag. Just wanted to make sure I'm right in my thinking. Thanks again!
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Yeah looks like some kind of deficiency -
Maybe potassium deficiencyComment
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Definitely needs some CalMag. You should probably get the ph up a little. I don’t grow in hydro but I’m pretty sure 5.2 is on the low end and ph needs to be on the high end for the plants to use magnesiumComment
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Ph needs to increase I run mine anywhere from 5.7 to 6.2 and never have a problem. Just make sure you mix it up abit so the plant gets what it needs
I run the canna range (aqua) never have any issues great product
Just keep your ppm and ec levels in checkComment
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It's showing some early signs of a Ca def.
Some of this is due to the pH you're running.
Ca and Mg are best absorbed by the plant when pH is above 6.0
I've always had best results when I allow the pH to start at 5.5 and allow it to rise over the 10-14 days between rez dumps.
Some cal-mag will help but correcting the pH will be best.
Can you give us some info on the nutes you're using and how much you're feeding them?WHAT???
5x5 grow space
900w of Vero's and F-strips
4-17gal totes self-made UC system.Comment
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