Shared lawn care question - one tenant just moved out.

[Lacee Beitler]

Hi everyone, Lawn care question about a duplex: *note: lawn care and snow removal is in both leases Care was split, tenant A tool care of back and side yard, tenant B took care of front (a hill). Tenant A has lived there for 30 years. This long term tenant started off like a dream, but recently has been very demanding. She is older and lives with her son, and they are now refusing to take care of the front lawn because Tenant B just moved out. They also will not pay for lawn care service to cut it. Lawn care is in both leases, but if one tenant moves out, can we make the current tenant take care of everything? Or do we have to do the other half/cover the cost of a lawn service until a new tenant moves in?