Can anyone tell me what they think is wrong? I’m thinking maybe a potassium issue? She’s not as tall as her sisters. They are all grown in a super soil. I have been keeping my water ph between 6.2 and 6.8
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Rust spots =calcium deficiency
Although your plants are so young I don’t see why so this begs me to say a slurry sample of your soil should be done to fine accurate PH, might as well check the tds as well.
Run off is not an accurate way to test PH in soil
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Tag an experienced grower like@kellydans or @Hellraiser ,looks like a p.h. problem to me,but let’s get more opinions.
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Have you lifted the leaves and looked under? See if there are tiny whitish crawlers under there. They are hard to see. If so start of spider mites. Had a batch I used a product called recharge. With molasses and beneficial bacteria. Week later my plants looked similar. Found mites.
Thanks guys. @jaymac I have checked under leafs and I don’t see any signs of pests . @Nicky this is my first grow. What is a slurry sample? The only way I know is to test the runoff.
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YouTube or Google will describe how to do it =)