Tenant not mowing lawn. What can I legally do?

[Elizabeth Blazina]

Hi Bigger pocket folks,

I have a renter in a duplex that does not seem to be able to keep the lawn in order.  It is in the lease agreement  and he is  renting month to month.  I did send a letter a month ago   stating that I am going to hire a landscaper to do it and consequently this amount would be added to their rent.  (Increase of $18.50. ) So the month has rolled by and no extra payment included and I am not sure which direction to go. I am not sure that I want to go as far as vacating them but I do want to send a message that I mean business.  Any suggestions??? 

Thanks for the feedback

Liz