Hi everyone,
I have a project I'm a bit stuck on. I'd like to add a small garden along my back fence, however there is a (roughly) 140mm gap between a retaining wall (as I am the higher property) and the actual back fence.
I'd like to know what everyone thinks about the best way to block this off, but also if I'd need to build a barrier from the fence for my garden for both the weight of the new soil and also to avoid any damage to the fence.
Hope my question makes sense and happy to answer any follow up questions. 
