From Ground: Begin by watering the soil around the spuria beardless iris. This will help to keep the root system intact. Dig a wide circular trench around the plant using your shovel or spade, ensuring you maintain a safe distance from the spuria beardless iris to prevent damage to the plant or its roots. Next, carefully scoop your spade under the root ball and gently lift it out of the soil, taking as much of the surrounding soil with it as possible.
From Pot: Water the spuria beardless iris well first to make removal easier. After it's dampened, flip the pot upside down while gently pulling or shaking the spuria beardless iris free, preserving as much of the root system as you can.
From Seedling Tray: Water the tray before starting, which will make the roots slide out easier and with less damage. Gently squeeze the bottom of the seedling cells while lightly tugging on the leaves of the spuria beardless iris to coax the plant out.
