Iris tectorum alba is also known as Japanese Roof Iris or Wall Iris. Originally from China, it has been found growing on thatched roofs in China and Japan and also in walls. It grows to about 18 inches with a spread of about the same in sun or part sun. Although not a bog plant, it does well planted around ponds or pools, but a rock garden is suitable also. I have them grown just about everywhere. The blooms are large and white and always a welcome sight in spring. It spreads by rhizomes, but they are planted only about an inch or two beneath the soil, something to know when placing them. A mass planting of these is beautiful. Zones 4-9.
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