From Ground: Begin by watering the dahlia 'Bitsy' to soften the soil. Use a garden fork to loosen the soil around the plant, then carefully use a shovel to dig a generous perimeter around the plant, avoiding cutting through the root ball. Gently work under the root ball and lift the dahlia 'Bitsy' out of the ground.
From Pot: Water the dahlia 'Bitsy' thoroughly. Turn the pot sideways and tap the bottom and sides to loosen the plant. Gently slide the plant out, supporting the root ball with your hands. If the dahlia 'Bitsy' is stuck, you may need to cut the pot away.
From Seedling Tray: Make sure the soil is moist, and gently hold the base of the dahlia 'Bitsy', carefully teasing out the seedling with a tool like a dibber or a pencil to minimize root disturbance. Support the root ball to prevent it from breaking apart.