I used to struggle with squash - they would go down quickly with powdery mildew every year (along with the cukes), but last year and this year have been good squash years for me. I grow them in 20 gal pots, placed close together. I still have some problems with lack of pollination and rotting fruits, but the majority do get pollinated by the bees and we end up with a good amount of squash. I've used GreenCure a couple of times when the powdery mildew was especially bad on both the tomatoes and the squash. But -- the main thing I do is spray the squash every week, without fail with Neem oil. I make sure I don't miss a week - even if it means spraying a few days early. In SoCal we don't seem to have as many problems with the squash vine borer (or maybe that's just my area). The Neem oil is the magic bullet, for my garden at least.
Lyn
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