From Ground: Initially, water the wall iris generously to loosen the soil. Use a shovel to dig a wide circle around the plant, keeping the root ball intact. Now, carefully place the shovel under the root ball, lifting the plant and its root system out from the ground.
From Pot: Start by watering the plant to make the removal easier. Invert the pot and give it a slight tap to loosen the soil and the plant. Hold wall iris at the base and pull it out gently. You might need to slide a knife around the inside edge of the pot to help in doing so.
From Seedling Tray: Water the tray and wait for a few minutes. Then push up from the bottom of the seed cell or use a fork to lift wall iris out gently, ensuring minimal root disturbance.