Your profile identifies you as being in PA. Your post mentions the word "Florida" without any context. Where is the condo located?
How much notice do I have to give her, and can I simply refuse to renew lease?
I see no reason to think you cannot refuse to renew the lease. However, what does it say about termination of the tenancy, renewal, notice, etc.? For all I know, it says the lease will renew automatically for another year unless you give notice X days in advance of the expiration of the term.