Birch bark textures....

I have a Minnesota birch tree in the front yard and it never looks like this.This was a clump birch that I bought at a Pamida store. I gave one to my neighbor and it grew tall and is thin. Mine is thick and the pealing bark is so colorful. Now that I have had this tree for a while I am thinking that I should have planted a couple of them together to get the clump look as this tree never put out any other sprouts.