I'm trying to figure out the title of a series I read when I was younger. As far as I can remember, it started with a spaceship crashing on a planet in book 1. Some plants on that planet had weird effects on the people of the ship, not sure what kind though.
All of the books afterwards are set centuries or even millennia later, about the rebuilt civilization where "magic" or some kind of powers were around.
I'll update if I remember anything more specific.