From Ground: Water the rose 'Complicata' plant to dampen the soil. Then, dig a wide trench around the plant using a shovel or spade, ensuring the plant's root ball remains intact. Carefully work the spade under the root ball to lift the plant from its original location.
From Pot: Ensure the soil in the pot is moist. Gently tap the sides of the pot to loosen the plant and slide it out, holding it by the base of the stem. If the plant is root-bound, loosen the roots gently with your fingers.
From Seedling Tray: Water the seedlings to ease removal. Using a hand trowel, carefully lift each seedling by the root ball, supporting as much of the root system as possible.