I live in NW Texas. In previous years, I grew spaghetti squash and had an abundance of big beautiful squash, but last summer, my plants reached all of three inches and simply stopped growing. In mid-July, I tried again with a new packet of seeds, with the same result. Every year, I rotate my garden, mulch, and amend with Miracle Grow. The only differences last year were the location of the squash (a slightly more shaded and damp area), the type of mulch (cotton burr), and the type of landscape cloth (tight black mesh).
I am getting ready to plant this year's garden, and am hoping for advice so that I don't have a repeat of last year. Oh, by the way, for the first time, my onion sets did not grow either. Don't know if that was coincidence or not, but it was awfully strange. Thanks!