I have several rockrose plants which are growing in almost full shade.
I know that they should be getting more sun but I want to keep them
where they are. Due to lack of sun they have become very leggy on the
one hand, but they also are getting largerr than I would like. I want
to trim them back but am not sure what is the best time of year to do
this or how far back I can cut them. Any adivice would be