From Ground: First, water the cutleaf waterparsnip plant to dampen the soil, making it easier to work with. Dig a generous circle around the plant with a shovel or spade to avoid cutting into the root ball. Once you've made the circle, dig down and underneath the root ball, then gently lift the plant out of the ground.
From Pot: Ensure the soil is moist and gently tap around the pot's edges to loosen the soil. Invert the pot and wiggle it off or roll it on its side and gently pull the plant out by the base, being careful not to damage the stem or roots.
From Seedling Tray: Water the seedlings to make the soil pliable. Use a garden trowel or your fingers to gently lift each individual seedling out of the tray, making sure to keep the root ball intact as much as possible.
