From Ground: Begin by watering the northern mountain ash plant to help loosen the soil around the roots. Using your shovel or spade, gently dig around the plant, starting a few feet away from the base to make sure you don’t accidentally cut into the root system. Once you've loosened the soil completely, gently lift the plant from the ground, keeping as much of the root system intact as possible.
From Pot: Water the northern mountain ash plant thoroughly. Turn the pot on its side and carefully pull or shake the plant loose, making sure not to yank or damage the plant. If the plant is reluctant to come out, roll the pot to loosen the soil and try again.
From Seedling Tray: Water the tray before attempting to remove the northern mountain ash. Gently press the base of each cell to push the seedling upward then carefully take it out, making sure to keep the root and soil around it as intact as possible.