From Ground: Start by watering your cliff spurge plant to moisten the soil. This will make removing the plant easier and minimize harm to the roots. Use a shovel or spade to dig a wide trench around the cliff spurge, but take note not to damage the root ball. Once you have enough room, work the spade under the root ball and gently lift the plant out of the ground.
From Pot: If your cliff spurge is in a pot, start by watering the plant. Turn the pot sideways, hold the cliff spurge close to its base, and gently tug the plant loose. If it's stuck, try loosening the soil around the edges with a trowel.
From Seedling Tray: For seedlings, make sure you water before starting. Use a trowel or a similar tool to carefully remove the cliff spurge along with its surrounding soil.