E.C. What does it mean?

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cbdeajr Perry, MO Nov 15, 2018

Setting up a small greenhouse to grow some Petunias. A web site that discusses the feeding say to use a feeding program of 250-300 ppm N with an E.C. between 1.5 - 1.8. I understand the 250-300 ppm N but what is E.C.?

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Cville_Gardener Clarksville, TN(Zone 7a) Nov 15, 2018

I believe that means electrical conductivity. https://www.extension.purdue.edu/extmedia/HO/HO-286-w.pdf

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cbdeajr Perry, MO Nov 16, 2018

Thanks, never heard about electrical conductivity before as it relates to fertilizer.

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