Hi! I have a bonsai tree that is not rootbound. I am wondering if I should pot it in new soil without trimming the roots so it has more nutrients or let it be.

Leave it alone, If the soil is percolating well and if it is not rootbound and you don't want to change the style then you should not re pot. You don't say what species it is but it does not matter,

smcarmen wrote: Hi! I have a bonsai tree that is not rootbound. I am wondering if I should pot it in new soil without trimming the roots so it has more nutrients or let it be.

is see you got your answer but need more info if you want better help for future reference.
location
species
how long has the tree been in that soil
pictures
stuff like that helps

Thank you! It is a parrot's beak. It's been in this soil for one year. I've had the tree for about three years. I live in Washington, DC. I have a new pot (different style that I like better), but I don't want to cause distress to the tree without real need. Thanks again!

smcarmen wrote: so it has more nutrients or let it be.

In bonsai, the nutrients come from fertilizer. The substrate is just there to keep the roots, provide water and hold on the nutrients for a bit. It does not provide nutrients. Most substrates used in bonsai have no nutrients.