Posted: 28/04/2012 at 15:04
Rock garden plants would prefer more sunshine throughout the year.
You really need to improve the soil before planting up by incorporating organic matter (well-rotted manure> and grit to improve the drainage and the structure of the soil. Once that's done, you will be able to choose from a large number of plants - to give just one example, I have roses thriving in a similar situation.