Landscape fabric and aegopodium

I told my employees about your post, and we could agree that fabic would make this WAAAAAAY worse. LOL

Hitting a layer of concrete (from former patio) under the landscape fabric.

I could say "landscape fabric" and stop there. I could say lilly of the valley and stop there, or ground elder, or that Japanese thing that grows into a tree in the right (wrong) situation. But beware the New Development. I did a lot of "Make it look good so that we can sell" jobs at one time and there is money in it. But don't look beneath the surface. I don't do it any more nicey because of too many days like your one.