Aww, shucks...
Thanks, June.
Sedum pilosum (now Rosularia pilosa) is another monocarp that depends on self-seeding. I have self-sown seedlings in the garden but it'll take a while yet before it will be clear if it's self-sustaining:
The seed starting mix I use is home-made and imprecise (because I'm lazy!) As time has gone on, I've gone to using more and more sand and grit versus humus (which is purchased potting soil). It also depends on what I have at hand. A typical mix these days would be equal parts sand, fine grit and potting soil with often a half portion of perlite thrown in. It's a lean-ish, fast draining mix - due to the sand and grit, a tray of seedlings is quite heavy. I re-use the mix from year to year (I knock a lot of the soil off seedlings in to a pail when I plant them out - planting space between rocks is often limited). I keep the collected and recycled alpine potting soil in Rubbermaid totes in the basement. This works here for me - if you have problems with damping off, it may not work for you.
