From Ground: Gently water the cold desert phlox's surrounding soil to make digging easier. Carefully dig a wide perimeter around the plant with a spade or shovel, going deep enough to include the entire root ball. Angle the shovel underneath the root ball to lift it out of the ground with minimal disturbance to the roots.
From Pot: Water the cold desert phlox thoroughly before starting. Turn the pot on its side and gently tap it to loosen the soil's grip. Carefully slide the plant out while supporting the base of the stem with your other hand. Inspect the root ball and untangle or trim any circling roots.
From Seedling Tray: Water the seedlings to ensure the soil is moist. Use a gardening tool or your fingers to carefully lift the cold desert phlox from its compartment, taking care not to damage the delicate roots or stem.