John KempfRegenerative Agriculture Entrepreneur

World's fastest nutrient correction foliar

4 Aug 2026 · 1 min

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0:58

A CropDix sensor tests a citrus leaf and delivers a full nutrient analysis in three minutes, revealing low potassium, sulfur, and nitrogen. The grower mixes a custom foliar spray with MacroPak and applies it the same day, versus a week waiting for traditional lab results.

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I got my CropDix sensor. I am going to take leaf samples this morning from my Sugar Belle Citrus, and then I'm going to make a custom foliar application right after. Bags here with the QR code, one for new and one for old. Skin it right there. Getting your results back in 3 minutes is pretty amazing. I have really low K, low sulfur, and low nitrogen. It's 9:24, so I really gotta move fast. MacroPak has sulfur and nitrogen in it. It also has potassium. It's 9:37. It is later in the morning than I'd like, but we're gonna get it. Typically, you collect leaves, you have to go to FedEx, ship them to the lab. It's like a week. With CropDix, it was 3 minutes. So that was awesome. I'll try to beat my record next time.