From Ground: First, water the mountain rue to dampen the soil making it easier to remove. Then, use a shovel or spade to dig a generous trench around the mountain rue, ensuring that you're not cutting through the root system. Gently work the tool under the root ball to lift the plant from the ground with minimal disturbance to the roots.
From Pot: Water the mountain rue in its container, then tip the pot sideways and support the mountain rue as you gently slide it out. If the plant is stuck, tap the pot's edges and bottom to loosen the soil and roots.
From Seedling Tray: Carefully remove the mountain rue by holding the base of the plant and gently lifting it, ensuring you support the root ball. If the roots are densely packed, lightly tease them apart without causing too much damage.