@muzz Once they're "adults" they change leaves about once a year. (I don't actually know what makes them considered seedlings vs adults, whether it's time or size.) My seedlings change leaves 2-3x in the first year and slow down the bigger they get. As for branching off new heads, that varies a lot by species, so I can't predict. 🤷♀️
Only one of my ten became two. I've been told not to seperate them though. I don't water when they're changing leaves or between Mother's Day and Father's Day and in the other summer months only a teaspoon a fortnight. So far they are doing well.