From the Ground: Dampen the soil surrounding the dwarf crested iris plant a few hours before transplanting using a watering can, making it easier to move. Use your garden shovel to dig a wide trench around the plant, keeping the root ball intact. Then, carefully slide the shovel under the root ball to lift the plant.
From a Pot: Water your dwarf crested iris plant well before starting. Invert the pot and tap its bottom to make the plant come out. If this doesn't work, you might have to cut the pot away. Make sure to keep the root ball intact during this process.
From a Seedling Tray: In case the dwarf crested iris is a seedling, make sure it has at least 4 true leaves. Gently separate the plant and its accompanying soil from the tray, trying not to damage the roots.