Someone wants to make a simple fast 'year-round' hedge screen (just about
two metres high or a bit less) and is wondering what would make some kind of
hedge simply from sticking cuttings in the ground.

Was amazed some time ago when someone put some completely shaved of bark and
chopped off, thin tree trunks in the ground as fence posts and after a
little while shoots appeared up and down them.

So i'm gussing some cuttings can 'more or less' just be stuck in the ground
to produce a hedge screen. But what kind of plants should i take such
cuttings from? Thanks.