Edging a mandala garden

I live in the UK, where grass grows easily. I'd like to do a mandala garden with grass paths, but I know how much work it is to maintain grass edges.

I'd like to edge the mandala to make semi raised beds, so that compost stays there, and I can easily strim and mow the paths.

But I'm not sure what material to use. Wooden boards won't bend easily to make the mandala shape. Stone would be great but it's not naturally occurring here and too expensive to buy.

Thanks for any suggestions

What about short log sections?

I have considered log edging, Im not Sure I have access to enough wood of a decent thickness. It would look fantastic, and im sure there would be some beneficial properties having decomposing wood in the bed.

I could end up needing 100m+ of edging material to complete my design

You can make an octagon shape instead of a circle.


My husband cut 2x4s to the correct angle for me to use for the joints.  The sides are made from fence slats.  I thought about making more of a keyhole shape but decided against it mostly because my carpentry skills are pretty poor and I really wanted to just get this done.