Hi all,
My name is Nick and I’m new here. I just got a bougainvillea and it has a huge root (see pics) that is is about 3” x 3” depth solidity the bottom. What should I do with this root when I repot? I like how it looks but is it taking away from the tree growth?
Also I got some substrate mix (see pic for contents), do I need to mix dirt in with it?

Thanks!

Wow, I would think about air layering it a bit higher, this species roots very very easily...