Yes, I would consider trying a batch of radishes (started in cool weather weather of course....may not be good to try this in Florida summer...)
Yes I'm already transitioning from winter to spring/summer. Not that we had much of a winter the past two years. Beautiful huge broccoli plants and they wanted to bolt as soon as they started forming heads because of the heat. I've harvested some, but not as much as I had hoped. They are about to get the chop and drop treatment.
Good idea on taking to the extension service. The first year I grew them in a container I got a few. Skipped a season because my back was bad and this season just in the ground so maybe a disease. I have some in partial shade now with a curled kale plant and a couple cabbage plants that probably won't produce. It's an experiment I started about 8 weeks ago to see if I can extend my season in the shady part of the garden. I should have added chard in there since I love it, but didn't think about it at the time.
One thing like R Ranson mentioned- failures give you food for thought on how to plan for the future garden. As I have the money I'm buying more sub tropical edible perennials to replace some of the "normal" vegetables that are just really tough here like broccoli.