Thanks to Rex Murfitt of Victoria BC I had over 50 silver saxes to plant out. Many of the plants are rare in Canada and include S. Monarch, S. Minima Glauca, S. St Johns, S. callosa Albert Albida, S. farreri, and S. burnatii.
I started by digging out the clay soil from a bank to a depth of about 2 feet. I backfilled with sand with a wide gradation from crusher fines up to quarter inch pieces. Some peat-based growing mix was worked into the sand- less than 10% of the total volume. I lined the uphill side of the excavation with landscape fabric to prevent nearby rhododendron roots getting into the bed and to discourage moles.
The rocks in the photos below are pieces of tufa laid out in a "crazy paving" pattern to create random crevices. I planted the saxes into the crevices and filled the crevices with pieces of tufa and small rocks that were tufa coloured. The end result I wanted was for the bed to look like one large broken rock outcrop with randomly spaced plants growing in cracks. Later I will also plant some saxes directly into the tufa.