instantiate trees

Hello community, I need help, I have been searching and cannot find a solution. I have created my own trees, and I want to add them to the terrain, but I can’t. Trees are prefabs with box collider. In the terrain inspector, I add the tree, but when I hit the brush to draw them, it doesn’t put them on the terrain. Can somebody help me?. Thank you, and sorry for my English.

Can someone help me?

What do you mean it doesn’t put them on the terrain? Are they floating or just dont appear? Perhaps a screenshot would help us help you.

They just don’t appear. In the inspector it appears as an object, but does not instantiate it