Lease Non-Renewal Dilemma

[Leo Gutierrez]

Looking for advice on a situation with a rental house in Saint Lucie County, Florida. My tenant's lease is up for renewal on Sept 1st. The tenants were willing to renew but I have decided not to renew their lease after we had some major disagreements today (right before I sent them the new lease). Instead, I told them that I will be mailing them a 60 days notice to vacate which is what the lease calls for. In reality I was delaying the inevitable for the last two years they have rented from me but my "grace tank" is about empty with these folks. Here is my dilemma... Since the current lease expires on August 31st, should I complete a month to month lease as of Sept 1st if they haven't moved out? Are there any other legal implications I should be aware of?  Any advice is greatly appreciated. 

[Leo Gutierrez]

I understand and greatly appreciate you helping me better understand this situation. It is the first time I run into an issue like this so talking it through with someone who's in the business has been very helpful. Thanks again Ned.