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Any insight would be great. I’ve been getting these rust spots on half my veg that are only 2 weeks old. I use Athena, start off with 250 ppm of calmag and aside from that I follow their schedule. Just can’t figure out what else this could be.
I believe you have a PH problem. Probably too low but you need to check your runoff water. This results in a calcium deficiency. If you are using cal-mag, then the low PH is prohibiting the plant from absorbing the calcium.
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