Welcome to North Central Florida, Josh! I'm just northwest of you, outside of High Springs. We've been here for almost 2 years...gardening here definitely has challenges, even though we can grow year-round. I spent the entire first year working on building the garden and growing soil - it's going to be an ongoing
project, since anything you add magically disappears within a month or 2. I can say that I'm finally getting a little bit of harvest, but mostly I've focused on
trees and perennials, so it'll be another year or so before I really see the effort start to pay off. (We also have Florida Cracker cows and sheep, along with pigs and poultry-we've been renovating pastures for the last year as well)
Some really good resources:
Mary's Heirloom Seeds has an awesome planting guide specific to our area.
There's a
facebook group called Grow Gainesville that focuses on edibles - they have offshoot groups for different aspects of
gardening and/or food production, there's a monthly meeting with workshops, various activities such as sweat equity work parties and garden tours...unfortunately, most of those things happen while I'm working! There are also a few
permaculture groups on there.
Edit to add...yes, mulch. It doesn't matter how much rain we get, the soil/sand drains so fast that all the nutrients wash away if you don't have something to hold them in place. I did in-ground raised beds, using logs from property cleanup, and used trench composting to get the fertility jump-started. Be extremely careful if you use
hay or straw to mulch, the farmers use persistent herbicides. I had a run-in with that last year...now I grow my own wheat to use as mulch. Also be careful of
local compost and/or manure - the herbicides pass through the animals.