From Ground: Firstly, water the dahlia 'Mrs Eileen' plant to dampen the soil. Use a garden fork to gently loosen the soil around the plant's root ball. Dig a wide perimeter to avoid cutting into the roots. Once loose, carefully slide the spade under the root ball to lift the plant carefully from its original spot.
From Pot: Begin by watering the soil in the pot to make the removal process easier. Turn the pot on its side and gently tap or squeeze the sides to loosen the root ball. Grasp the base of the dahlia 'Mrs Eileen' and ease it out, being mindful not to pull on the stems or leaves aggressively.
From Seedling Tray: Water the seedlings well first. Gently press from the bottom of the cell to push the dahlia 'Mrs Eileen' seedling out. Handle the seedling by the leaves rather than the stem to minimize the risk of damage.