Iris kaempferi--Japanese Iris

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Iris kaempferi--Japanese Iris

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The Japanese iris produces large, flat, flowers up to 6 to 8 inches across, between June and August. Flower colors are shades of white, lavender, rose, purple, and pink. The plant grows best in sun or partial shade and in a rich, moist, acid soil. Do not use lime or other pH raising materials around japanese iris. The plants are useful near water and can be left for many years without dividing. Set the plants 18 inches apart. The foliage is 2 and a half feet tall and flowering plants are 3 to 4 feet tall.

Seed can be planted outdoors in fall or early winter to germinate in spring. They can be placed in a moist covering and kept in the refrigerator for 6 weeks. They germinate slowly and irregularly over a 3 to 5 weeks period when kept at temperatures between 65 and 75 degrees.

These iris are not as susceptible to pests as some of the others although they will be attacked by thrips.

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