Iris plants are easy to grow, bursting with color, and water thrifty. Perennial Iris are a welcome sign of summer. Many of our Bearded Iris are re-blooming varieties. When promptly deadheaded in early summer, the plants re-bloom in late summer/early fall with nearly as many flower stalks as in the spring. Divide the clumps in late summer every three to four years to keep them blooming and healthy. Drawing its name from the Greek word for 'rainbow,' iris burst with color.