Lawn edges that can't be mowed, because of a house wall or something, are an issue at my place. If just leave the grass at the edge, it grows long, then grows to seed, and the long grass seems to expand in width inexorably over time.

I don't want to use a plastic-shedding line trimmer or herbicides. I end up pulling out the grass near the edge, leaving a bare strip that takes a while to grow back, but it's a bit labour-intensive.