I love those flowers. They look so much like my cynanchum marnierianum flowers.I have a fockea too but so far it hasn't bloomed for me. I am not sure if it is old enough yet or if I am not providing favorable conditions.
You'll get a sense of how they're doing once you start repotting them. It's very hard to know what's going on below ground without taking them out to look. My advice to get good growth from young plants would be to overpot them (pot should be deeper than wide) and leave them buried. Once they are a good size you can lift them for display.