The rocks were already in place for the rockery, so all I had to do was choose plants - mostly alpines - and then what type of gravel to put at their base to improve drainage and stop them rotting.
This was before, you can see the rocks on the left of the photo.
Here are some of the plants -
on a bright day, the gravel looks white!
So there's my rockery planted - next is to plant the climbers for the trellis, get the paving laid, new gravel, then I can plant the main body of plants!