From Ground: First, water the virginia threeseed mercury plant well which will help to ease the stress of the transplant process and keep the roots moist. Then, carefully dig a wide circle around the plant with a shovel or trowel, ensuring the root ball remains intact. Slowly work the shovel under the root ball and lift the plant out of the ground. Be careful not to damage the roots as you lift.
From Pot: Water the virginia threeseed mercury plant thoroughly. With one hand at the base of the plant and the other holding the pot, gently pull while turning the pot to loosen it. You can tap the edge of the pot to help dislodge the plant. Support the plant at its base and the root ball as you remove it.
From Seedling Tray: Make sure the seedling is well-watered prior to transplanting. Gently loosen the soil around the base of the virginia threeseed mercury. Use a seeding spoon or similar instrument to scoop under the root ball, taking care to minimize damage to the roots. Hold it by the leaf, not the stem, as you lift it.