impregnated bendable board for border edging?

[Yrrol]

I'm going to make new gravel paths and I'm considering material choices for edging.
One of the paths has some curves and I'd like to see soft forms on the edging.

So I toyed with the idea of using roll edge. But I think it seems difficult to get everything very even. Most photos I find show that these are a bit uneven. Then it's not tight between the slats so grass roots might go through.


Instead, I'm considering using boards. But then I imagine these are not particularly flexible.

So my question, plain and simple, is there pressure-treated boards suited for this that can be bent somewhat?



At the same time, I think it seems a bit neat to skip the gravel and make wood paths instead.
Then maybe future robotic lawnmowers will be happy too.

 

[fia_mstd]

Trägång was very fancy!!!

 

[kenneth5828]

Grass and other things will likely grow through the wooden walkway, as it's not possible to get it that tight, or?

 

[MartinBranden]

Grass and other things will surely grow through the wooden path, because you can't get it that tight, right?

You have to lay ground fabric underneath.