Use a tree that will grow well under local environmental conditions and provide it with plenty of space to grow and mature. This includes both vertical and horizontal space for the canopy and plenty of room for root growth.
Wide areas give the roots a place to spread and grow.
Dig the hole no deeper than the root ball to keep the tree from settling too deep and dig square holes to allow for root penetration out of the hole and into the surrounding soil. If it takes longer than 24 hours to drain, select another site. A tree will die if its roots are underwater for long periods of time. Remove dead, broken, and diseased branches and crushed and girdling roots only . Removing even a small portion of the healthy canopy actually slows root growth and delays establishment.