From Ground: First, water the butterfly-flower plant to dampen the soil which makes it easier to dig around the plant. Then, slowly dig around the plant with a shovel or spade, making sure not to cut off any roots. The goal is to remove the root ball with as little damage as possible. Once you've isolated the root ball, gently lift the plant from its original location.
From Pot: Start by watering the potted butterfly-flower, this helps the plant to slide out more easily. Keep the plant horizontal and carefully turn the pot upside down, then give it a genial tap at the bottom, the butterfly-flower should slide out easily. If it's stuck, you may need to loosen the soil a bit around the edges with a gardening knife.
From Seedling Tray: Water the butterfly-flower seedlings first. Then, using a gardening stick or your fingers, gently push up from the bottom of the cell or section, and lift the seedling out, holding it by its leaves not the stem.