Chenoa, I have a book written by an extension agent from Orlando that has more specific planting dates for just about every type of veggie you want to grow in Florida.
"The Edible Landscape" by Tom McCubbin is available on Amazon, along with its sequel "Florida Home Grown" I can't tell you how many times I've fallen asleep over these books.
https://www.amazon.com/dp/0941263037/
I do think that although you are in the same zone as Dave, we stay warmer until later in the fall because of closer proximity to the ocean and gulf, so I don't plant my cool season things like broccoli, lettuce, and spinach until at least Labor Day. (but I am further south than you) Our first "cold" front usually comes through here around mid-October.
That being said, gardening is dictated in the end by the weather, which as we well know is very hard to predict, and impossible long term. It's not a big deal if you were to plant some more seedlings later if these first ones prove to be too hard to "hold" until the weather cooperates for you. You can keep the cool season veggies going all the way through the winter, and I even kept my tomatoes and peppers producing last year with a little covering and coddling.
