From Ground: Start by watering the slough Sedge to moisten the soil, making it easier to remove the plant. Then, dig a wide berth around the plant with a shovel or spade without disturbing the root ball. Gently work the tool under the plant to lift it out with as much of the root system as possible.
From Pot: Water the slough Sedge in its pot to help loosen the soil. Tip the pot sideways and pat the bottom to help the plant slide out. If the plant is stuck, you can use a garden knife to loosen the soil along the pot's edges.
From Seedling Tray: Water the cells to make the soil pliable. Gently press the bottom of the cell to push the seedling out without damaging the roots. Use a garden knife to separate seedlings if they are too close together.