[raydev]

How would you keep it from filling up with weeds in any reasonably grass-friendly climate?

I just pay someone $50/week to mow my lawn and I pay zero attention to it. If we have a mini-drought and the grass turns brown, oh well.

[grantith]

Kill your lawn and let the native plants take over.

[raydev]

I'd rather not get a bunch of ticks while walking to my door.

[satiric]

If you kill the lawn, won't the invasive plants take over?

[duskdozer]

Even if they were going to, you could just seed it with some native, low-growing "groundcover": clovers, fescues, whatever is in your area.