In message , Nick Maclaren
writes
Agreed, but my comment was about how to make them fill out (e.g. for a
hedge). You need to cut back to well below where you want the top to
be. Once they have filled out, you cut back the new growth once or
twice a year.

I've wondered how pleached pyracantha would work. Have never heard of
it, but I don't see why it couldn't be done, and it could be very
attractive.

--
Klara, Gatwick basin