I like to attract them also to our yard.
The Ruby-throated Hummingbird lives in central Florida, almost all year round, and have many species pass through during migration twice a year.
I have talked with some knowledgeable folks, and the important thing is the yard and neighborhood. Because of their high metabolism, they don't waste time looking for new food sources. If they have found a reliable food source they will visit frequently.
If you have not done so, Consider planting plants and shrubs that are known hummingbird food sources that are native to Florida. The University of Florida has some excellent hummingbird information and feed plant lists at the following web site:
WEC21/UW059: Hummingbirds of Florida
Also, check out this forum for comments from people in Central Florida that appear to know what they are writing about.
Http://floridahummingbirds.net/1511.html