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I got some yellow spots on a few leaves. Dont know...
Psychonautanswered grow question 5 years ago
Yeah, most probably it is a calcium and magnesium deficiency. It happened to me several times when I was trying to grow without CalMag. You should sort it out the necessary needed by your plant, each one being different
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OutForRealanswered grow question 5 years ago
Rust spots = calcium deficiency and purplish petioles of the leaves = Magnesium deficiency ; so they don't get enough of the cal mag you'r adding. You can also rise your Ec up to 1.4 at that stage
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Stickanswered grow question 5 years ago
Hi @underdog! Yep it looks like a Calcium deficiency. Add some more Cal/Mag to your reservoir and progressively slow down on Nitrogen intakes as the stretch will end. Affected leaves won't recover so you can tuck them away once they're half dead but the new growth should be healthy. Hope this will help, keep us up-to-date and happy growing! 👊
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