What a season of learning. It is true, the coastal areas of the south are quite different from other regions in the country. Hot, dry, bugs, diseases - you name it. I visited my local nursery today and even the owner admitted to me that after several years, he is still learning.
Takes time along the Carolina coast. Just keep experimenting, eventually it comes around albeit may be costly the first few years. Eventually, I have learned that you know what to plant and harvest and what to buy at your local markets.
Going forward now, into fall crops. Hoping these will be a better experience. Will keep you posted.
Best of luck with your winter crop!