It felt really bad when I lost my Oxytropis halleri seedlings two years ago (particularly because I knew why). Now, from the few seeds left, I got new seedlings! and I will be more careful. Most alpine plants develop incredible long roots very fast and should be transplanted ASAP. Seedlings of a high elevation growing Astragalus, Astragalus oreades, will keep them good company. As well, just a few leftover seeds from a Caucasus collection.
For both species (Fam. Fabaceae), I scarified lightly the seeds, placed them in moist paper towels, sprinkled over a bit of GA3 solution, and kept them in the fridge for a couple of weeks. It is hard to say if the scarifying worked until you see the seeds nicely expanding by absorbing moisture, so it’s best to scarify less than too much (as seen in the images, I didn’t quite ‘scratch’ them all, but you can repeat the procedure). Ga3 is not absolutely necessarily, but you will have to allow for a longer cold-moist period.
I only have pictures with Oxytropis , but they are both glorious alpine plants; such a nice pair for the rock garden!