I'm not sure what to think about this dwarf sag. It looks exactly like it did when I planted it - no growth, no melting, just nothing! I'm starting to wonder if it's made of plastic.
If I can get it to send runners, I'll be thrilled because my goal is to 'grass in' a 24 inch wide background (I have about 5 inches of width to let the sags send runner across.) It sure looks nice, but 5 weeks and not even the slightest change in their condition!
It is a slow plant to adapt. once it starts growing it will take a while to get runners going too. You might be able to boot it up a bit by putting some root tabs in the soil right under them. If you need, I have a few capsules of Root Medic root tabs laying around.