Aquaponic Gardening

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 I have been reading here where chelated iron is a major issue. Maybe not major as compared to  the nitrification process, but significant anyway.

Is there a way to produce your own plant-available iron WITHOUT buying  commercial supplements?

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Sylvia, American Clayworks in Denver has EDDHA and DTPA.

Beauty!  Thanks, Dan...we're on it...!

Here's a sunflower plant with iron deficiency. I'd like to add it to the list as a canary plant. The rest of my plants in this system aren't nearly as yellow.

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