From Ground: First, water the dahlia 'Tsuki' 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 plant thoroughly to ease its removal. Gently squeeze the sides of the pot to loosen the soil and roots. Turn the pot upside down while holding the plant carefully, and tap the bottom to release the plant, ensuring the root ball stays intact.
From Seedling Tray: Water the seedlings to soften the soil. Use a small trowel or spoon to gently lift the seedling from underneath, ensuring not to damage the roots. Hold the plant by its leaves, not the stem, to prevent any damage.