From Ground: Start by watering the northern Maidenhair Fern plant to dampen the soil, making excavation easier. Use a spade or shovel to dig around the plant, leaving ample room to avoid damaging the roots. Work the spade under the root ball to lift the plant, ensuring you maintain as much of the root system as possible.
From Pot: Water the northern Maidenhair Fern plant thoroughly, then tilt the pot to the side and gently tap it to loosen the soil from the sides. Support the plant's stem and root ball with your hand while carefully sliding it out of the pot. If the plant is resistant, you might need to tap a bit harder or use a knife to slice through compacted soil without harming the roots.
From Seedling Tray: Moisten the soil in the tray to facilitate removal. Grasp the northern Maidenhair Fern seedling by its leaves (not by the stem) and use a spoon, dibber, or your fingers to loosen the soil around the roots. Gently lift the seedling from the tray, making sure to keep as much soil around the roots as possible.