From Ground: First, water the dahlia 'Cornel' 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: Water the dahlia 'Cornel' plant generously, then tilt the pot and gently tap the sides to loosen the soil. Hold the plant by its base, and carefully pull it out of the pot ensuring the root ball stays intact.
From Seedling Tray: Moisten the soil in the seedling tray. Use a hand trowel or your fingers to carefully lift each seedling by its base, ensuring you don't damage the delicate roots.
