Fitting rockfaced gravel board as lawn edging.
I am halfway into my first gardening project! I am planning to replace the turf at a damp end of my lawn with gravel. I have dug everything up and before I put membrane and gravel down, I need to put the edging on one end.
I want to use rockfaced gravel boards 6ft x 1ft (see pic below) as edging. However I do not want to install concrete fence posts as I don't have the machinery to do that. I think the area will only need 2-3 gravel boards in a line to cover the edging.
My dilemma is, how can I ensure that these are fitted sturdy enough in the soil without use of concrete posts? Please see pic below, you can see where I want to install the gravel boards in pic.