Here is an update on the above Isella semp and also the S. 'Pink Pearl' that was rotted so bad this spring. I went by your above instructions Dr. Houseleeks.
Here is the results with both varieties.
---------------------Isella 2/23/2011---------------------------------S. 'Pink Pearl' 12/31/2010
And this has been a very wet winter. In the fall I transplanted them into the raised beds, they came through winter in beautiful condition. Just needed much faster draining soil. The Miracle Grow potting mix compacts starting about the second year, and these were in the same pot for about 5 years. It's a miracle I had any of them survivu.