I am growing squash for the first time, some is planted in a raised bed
and some in containers. The first set of true leaves on a few of my
plants started to turn slightly yellow and get some brown spots. The plants still seem to be growing healthy leaves. They are planted in Kellogg's Raised Bed and Container Potting Mix. I have attached a couple of pictures. The larger plant is a dark star zucchini, this one looks the worst. The smaller plant is a Butterbush winter squash, and it is just starting to yellow and get some brown spots. Any help would be much appreciated.