Slanting birch
For a thirsty birch this pot is a bit on the smaller side. But I love it and I do not have anything that will suit the tree better. So another season in small shoes... The only think I can do better - instead of a "normal" watering the tree will enjoy frequent submerging in the tub full of water. I do that with a number of my other trees anyway. The crown look a bit heavy rihgt now and it will stay that way ( and even worse ) for another few weeks. One of the side effect of the flat container - it helps to form surface roots with a lot of character.