Help Please! Edging Question
At this point I’m begging for help because I can’t figure this problem out anywhere I look. In the picture I’ve extended out my edge line between my bed and yard, underneath the pine straw is landscape tarp. Basically I extended it because I didn’t like the grass trying to grow into flower bed, and there doesn’t exist an edge blade thick enough to just maintenance edge this thing with my weekly cuts. A standard edger, how it was before, left too weak of a line, so I decided to edge and retrench back a little. My question is what is the best way to maintain this new edge line so it maintains its integrity (doesn’t sink back into itself from the yard side and stays nice and vertical), and secondly doesn’t get over taken by weeds in the trench part? Sincerely appreciate any help/advice