Why is the new growth on zucchini plants yellow?

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no1nct Waterbury, CT Jul 19, 2020

I have been searching for an answer, but none of what I see seems to match what's happening to my plants. I tried spraying the leaves with an epsom salt solution but there was no change.

Thanks for any help you can offer, this is my first garden.

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Zen_Man Ottawa, KS(Zone 5b) Jul 22, 2020

So you have established that the nutrient deficiency is not Magnesium or Sulfur. I suggest you apply a complete soluble nutrient formula. As far as I know Miracle-Gro does not have a Zucchini Food product, but they do have Miracale-Gro Tomato Food and I recommend that you apply it as a foliar feed according to the directions on the label. I apply it to my zinnias as a drench with about one tablespoon of product dissolved in a gallon of water. It comes with a little plastic spoon sized for a standard watering can.

ZM (not associated with Miracle-Gro)

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