Question: The leaves on my zucchini and squash are turning yellow. The blossoms shrivel up and die. They are producing but only a few at a time. The rest just don't mature. I live in Northern Ca and they are planted in half barrels. I used 1 bag of Patio Plus Outdoor Potting soil and 1 bag of topsoil. I have been using Miracle Grow to fertilize. I hand water everyday or two depending on the weather.
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