From Ground: For an bush penstemon plant planted directly in the ground, first, water the area to dampen the soil. This will make the removal easier and also ensure the root ball remains intact. Dig a wide circle around the plant using a shovel or spade, taking care to leave a generous amount of space to include as much of the root system as possible. Gently push the shovel under the root ball and lift the plant carefully, making sure you do not damage the roots.
From Pot: In case of a potted bush penstemon plant, water it thoroughly first and let it drain. Turn the pot sideways, hold the plant gently at the base and pull it out. If the plant does not slide out easily, tap the sides and bottom of the pot to loosen the soil and try again.
From Seedling Tray: For bush penstemon plants grown in seedling trays, water the tray and then turn it upside down, taking care not to shake the tray or squeeze it too hard. Lift the tray away from the seedling. Be very careful as younger plants are more delicate and prone to damage.