The time period you must wait after a foreclosure can range from as little as 2 years to as much as 7 or 8. It depends on your circumstances, did you have a medical illness, divorce or lost a job -- those things can change the wait time for some loan programs. How much money you have to put down for the next home also plays a factor.
If you are in foreclosure in FL you really should speak with a local real estate attorney who deals in foreclosures because there is the possibility that your lender can foreclose on your home AND get a judgment against you. That could impact your ability to get any sort of loan in the future.