"al" wrote in message
...
Any particular soil
type best to stick underneath it? I've still got some left in a 200l
Irish
Peat Moss bag. Could get some topsoil or normal compost if that'd be
better? Mind you, I don't want it to be more fertile than the grass
around
it and grow faster/greener!

We used topsoil - it tends to migrate round the garden as new beds are dug
and new projects started.
(We also move grass around when beds are dug or filled-in - turves sometimes
get "parked" between rows on the veggie beds to keep 'em ticking over 'till
needed!)