On 25 Feb, 19:35, "Jeff Layman" wrote:
Pyracantha would probably fit the bill. You could always mix it with Rosa
rugosa and blackberry. That should provide a pretty impenetrable mass. How
about adding a blackthorn for good measure? A good selection of flowers and
fruits there.

My rosa rugosa groes like buggery on it's damp, clayish, heavy soil -
except in shade. As for Blackthorn, that's what is causing the
shade. It likes going upwards.