Mulch

Bought 50 bags from Southern Season this year. Doing left side, mostly.

Later: Did whole lawn edge, top by compost pile, and started to cover massive weeds on teacher-house side, but barely scratched the surface.

Still later: picked up 5 bags at Lowe's (Honda trunk-full) - probably 10 more would cover up what I want covered on the teacher-house side. Le sigh.