New tenant, paying on time, 2 months, not mowing lawns

[Cali Skier]

We are still new to this and have not had to ask a tenant to cut the grass.  We have some new tenants, young, just got married, Air Force. They are paying on time, been in our house for two months.  The problem is it appears the lawn is not being cared for.  What is a positive first approach to get them to cut the grass?

[Nathan Gesner]

Written violation notice with a deadline to correct and a penalty for failing to do so.