Japanese iris have no beards and bloom is from late June to July in New England. Japanese iris leaves are taller and thinner than bearded iris leaves. Japanese iris leaves have a distinct rib that runs lengthwise down the leaves. This rib is a good way to distinguish Japanese iris from other types of iris.

No other iris is influenced to as great a degree by culture as are Japanese irises. They require ample moisture, especially up to bloom time. You will be rewarded with much healthier plants and bloom if the plants are kept watered all summer long. Lack of moisture will stunt the plants and produce miniature blooms. A good place to plant them is near a pond or stream, though not required.