No experience.
2006 After a rain or wet snow in late spring, I find some lance leafed stonecrop just starting to swell and show; the above image shows a group of lance leafed stonecrop in late spring. At this point, the lance leafed stonecrop have very few live roots and transplant readily.
2008 I would like to collect some seeds from lance leafed stonecrop and to transplant more of these into my rock gardens.