
I don't want to just line it with a strip of ugly concrete so was thinking of getting a bag of builders mix, dampening it a bit, and mixing in a half-bag of leftover grout I've had sitting around. The idea isn't to make concrete but more a fortified hardfill that doesn't scatter all over the place when leaves on top of it get raked off.
It seems like a no-brainer, but I'm sure if I go to it right now someone will come along in the future and say "well, that looks pretty good, but did you think about using ...?", so I thought I'd run it past the peanut gallery here first.