Hi Lisa,
By the time they have outgrown a compot they should be pretty tough and ready to be treated more like an adult. The tricky part is over and these teenagers will do fine, but they'll need what all teenagers want - a good balanced diet. You may want to go with a finer medium than you use for your adults, but other than that it's pretty similar to the rest of your Paphs.
If the roots are still very small, just leave them in the compot a bit longer. As long as they're happy in there I'd leave them as long as they can stand it. They really do like the company. I usually break up compots too early, but evidently I never learn my lesson.