Does Rosa rugosa need full sunshine, or would four plants grow just
as
well
in a north facing front garden that gets partial sun? The soil is on the
poor side, top soil mixed with a lot of sandy hardcore, having previously
been used for an extra car parking area.

in my experience, they grow well nearly anywhere...
full sun or shady, they seem to do ok..

Morgan
(newbie here)
I have one in a south facing bed in good soil and another in the shade
with poor soil, they both do well :-)
kate