From Ground: Prior to removing the american hophornbeam from the ground, water the plant to slightly dampen the soil, this will make it easier to remove. Then, dig a trench around the plant, ensuring the root ball remains intact. Carefully loosen the soil and work the shovel under the root ball to free the plant.
From Pot: Water the american hophornbeam slightly and gently tip the pot sideways, then apply a light tap to the bottom of the pot. The plant should slide out easily, if not, a trowel can be used to ease the plant out without damaging the root ball.
From Seedling Tray: Water the trays beforehand, then gently push the root ball from beneath or use a trowel to lift the seedling out. Be sure not to pull the seedling out by its stem.