Beautiful! Birch trees are among my favorite trees.

You can grow most anything in a pot, but you'll eventually have to remove them from the pot and prune the roots and put new soil in the pot.

Plant now and read [Trees in Containers III[(https://www.houzz.com/discussions/trees-in-containers-iii-dsvw-vd~1389927)

What variety of birch is this?

Species is Betula papyrifera (commonly: paper birch)

Pleasing enough to the eye, for sure, but it does look like a spanking brand new planting to me and leaves me wondering if the trees are still B&B. Was it a good choice other than for temporary eye appeal? The proof will be in how they look 5 years from now, and I say that because they are known to be particularly sensitive to the air pollutant SO2 (sulfur dioxide), which there is no scarcity of in the area and probably why they don't grow among the hundreds of tree species in Central Park.

Al