"aquachimp" wrote in message
...

Even a kerb stone would be undone in that situation I think. What I
thought the OP referred to was gravel boards all the way up.

I have seen a retaining wall made from concrete fence panels three high.
It broke in several places within a couple of months.
The last time I saw it they had inserted extra concrete posts in the centre
of each panel, AFAIK they are still holding it back after a few years.