With their showy spring flowers, bearded iris are one of those “must have” plants for your garden. Iris are generally low maintenance plants season after season, but over time they can become crowded and they stop producing as many blooms. That’s an indication they need to be divided and the time to dig and divide iris is now. The best tool to use to dig iris roots – called rhizomes, is a spading fork. Spading forks make it easy to get under and lift the rhizome without causing damage to the roots. Once you’ve got the clump of iris out of the ground, you’ll be able to see the rhizomes clearly. You’ll want to remove any old or diseased rhizomes.