Broad Leaf Tree Container

Q: Could you suggest an umbrella-shaped tree with large leaves that would provide shade in an area that gets full sun? The tree will be planted in a container 4 feet wide.

A: I think your only option for an umbrella-shaped tree that provides shade is big leaf magnolia because it has huge leaves and can take full sun if the root system is healthy. The container could be a big problem. A tree should be planted so the top of the root ball is level with the surrounding soil. The tree roots would be stressed if planted as you describe. A shrub would be better suited for the space.