These hedges are made from synthetic wire wool from a DIY store. It
is quite expensive (in the £4 - £5 mark)., but you can make a load of
hedges from the stuff. It comes in squares, of 4" by 2" wide and about
1" deep. If cut them in half lengthways so that they can make 2" high
hedges, then I trim them to bevel the top of the hedge slightly using
my wife's best kitchen scissors of course.