From Ground: Start with watering the pink-sorrel plant to dampen the soil; this makes it easier to dig and minimizes stress on the plant. Dig a wide circle around the plant with a spade or shovel, ensuring to keep the plant's root ball intact. Try not to cut the roots while doing so. After that, carefully slide your spade under the root ball and gently lift the plant from its original location.
From Pot: For a potted pink-sorrel plant, water it an hour before the planned move. Turn the pot sideways, hold the plant gently at its base, then gently tap the edge of the pot against a firm surface to loosen the plant, and gently slide it out. If the plant is stuck, you might need to break the pot.
From Seedling Tray: Water the seedlings first. Then, gently hold the pink-sorrel seedling by its leaves to avoid damaging the stem and roots, apply gentle pressure to the base of the cell or pot, and lift the seedling out.