Hooray! The sign says it all. Note the gold label, which is the higher of the two classifications. (It's not difficult to qualify if you're an environmentally aware gardener.)
The extension office in most Florida counties participates in the Florida Yards and Neighborhoods program.
My next goal is to have the garden certified as a Florida Backyard Wildlife Habitat, which is more complicated since there are forms to complete, a property survey -- with bird feeders, native trees, shrubs, and the like, all marked out -- to submit. Plus it will cost a whopping $5 for the sign.