Oh I always lov these guys. I had one that was in a pot saucer 3"" deep and 22" wide with sandy soil well daring mix. Started with three florets after two years it grew to cover the 22" pot saucer, all the way to the ground about 22". It's floweres was so beautiful and elegant.
Blue color leaves with yellow delicate flowers. Had it for four years and repotted twice. It reminded me of a water fountain overflowing to the ground because of the blue puffy leaves.
Best tip: lots of indirect light,heat 78-85',and only water when soil feels dry. Each watering add succulent liquid fertilizer half strength. Keep it outside during summer loves the summer weather. Protect from direct light .it never has any bugs best part. Then enjoy the show!
Another fav is what's called hen and chicks. They are hardy to zone 6 and grow like ground cover in many well daring soil areas and sheltered from direct sun.