From Ground: First, water the ground around the dahlia 'Fleurel' thoroughly to make the soil easier to work with. Use a garden fork to gently loosen the soil around the plant, taking care not to damage the root system. Carefully create a wide circle around the plant with your shovel, and then slide it under the root ball to lift the dahlia 'Fleurel' out of the ground.
From Pot: Water the dahlia 'Fleurel' well before starting. Turn the pot on its side and gently tap it to loosen the plant. If the dahlia 'Fleurel' is stuck, you may need to run a hand trowel or knife around the inside edge to free it. Carefully remove the dahlia 'Fleurel' by tipping the pot and supporting the plant with your other hand.
From Seedling Tray: Water the seedlings to ensure the soil is moist, then use a hand trowel or a wooden stick to gently pry each dahlia 'Fleurel' from its cell. Be very gentle to avoid damaging the tender roots and stems.