Lifting and dividing an overcrowded iris Irises are easy to grow and flourish even on a heavy clay soil. They enjoy a sunny position as their rhizomes spread over the surface to soak up the sun.
Individual blooms are beautiful but short-lived.
As soon as the flower spike is overcut it off close to a leaf. Flowering increases for two or three years after planting but then diminishes quickly. The oldest portion of rhizome stops producing flower spikes, which only come from the younger outer growth. This is your signal to lift and divide, discarding old bits of rhizome and replanting only young portions. Lifting and dividing an overcrowded iris Lifting and dividing Planting suggestion Search for plants by plant name or sun exposure and soil type.