From Ground: First, water the black bat flower plant sufficiently to make the soil moist. This will make it easier to remove the plant without damaging the roots. Use a gardening fork to carefully dig around the plant, making sure to keep enough distance to not harm the root system. Once you've loosened the soil around, lift the plant gently from the ground.
From Pot: To remove the black bat flower from a pot, water it first. Invert the pot and tap the edges lightly to dislodge the plant. Use your hands to support the plant while you're doing this. If the plant is firmly root-bound and difficult to remove, you may have to cut the pot away.
From Seedling Tray: Wait until the black bat flower has grown a few inches tall with at least two sets of real leaves. Gently water the plant, then use a spoon or similar to remove each seedling along with its surrounding soil, being delicate not to damage the fragile roots.