I'm in the process of building a couple of raised beds from scaffolding
planks. 4ft x 12ft. If the weather's reasonable I'll try to make one
of them this weekend, but before I do the next one I have to decide on
the width of the gap. Was going to say 3ft, but laying it out on the
existing lawn, that seems unnecessarily wide and wasteful. Will I be
forever annoyed by 2ft6? Can I go even smaller?

Peter