Your Ficus bonsai looks great man! The roots start to look for more space, roots from Ficus are notorious for traveling above ground. Think of the trees that cover the ruins of King Louie in Jungle book, for example.

You can cut the roots that come above ground off, I mean for esthetic reasons. Roots that start from the trunk above ground are okay though, but roots coming up at the end of the pot in my opinion not (is my opinion, not a rule or anything). It has nothing to do with your pot, unglazed is fine, and the pot suits your tree. I think your soil mixture is okay too. So I guess it is just the roots searching for more space, and Ficus tends to traveling above ground if necessary.

Your Ficus bonsai looks great man! The roots start to look for more space, roots from Ficus are notorious for traveling above ground. Think of the trees that cover the ruins of King Louie in Jungle book, for example.

You can cut the roots that come above ground off, I mean for esthetic reasons. Roots that start from the trunk above ground are okay though, but roots coming up at the end of the pot in my opinion not (is my opinion, not a rule or anything). It has nothing to do with your pot, unglazed is fine, and the pot suits your tree well. I think your soil mixture is okay too. So I guess it is just the roots searching for more space, and Ficus tends to traveling above ground if necessary.