In Florida, direct sowing is just making salad for bugs, and the soil in most parts of the Peninsula is too fast-draining to supply nutrients. A raised bed underlain with a sparingly-pierced tarp is one solution. If you can provide a place that shows without being an irresisible temptation to filchers, you can also try a potager consisting of decorative pots plunged about a third, nursery cans plunged about two thirds, and big tubs and jardiniers (secured by chains, if need be) for things like Ceylon peaches, grape vines that like the climate but not the natural soil, and heirloom corn or sorghum that needs enrichment to reach full height. The spaces between the plunge pots can be filled with groundcovers; I like our little native Salvia riparia, known locally as blue marjoram. Weddel daisy takes anything but harsh cold and is colorably native, but pretty aggressive.