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The best time to divide a perennial is when it is not blooming. Perennials that bloom in the fall should be divided in the spring and perennials that bloom in the spring/summer should be divided in the fall. The ideal day to divide a plant is when it is cool and there is rain in the forecast. [4]
"Japanese iris" is also a catch-all term for the Japanese iris proper (hanashōbu), the blood iris (I. sanguinea, ayame) and the rabbit-ear iris (I. laevigata, kakitsubata). I. unguicularis is a late-winter-flowering species from Algeria, with sky-blue flowers with a yellow streak in the centre of each petal, produced from Winter to Spring.
Iris japonica growing in Fukushima, Japan. Iris japonica is very common in cultivation in USA, [2] it is the most commonly cultivated crested iris in the UK. [10] [23] It is hardy to between USDA Zone 7 and Zone 10. [7] It is also hardy to European Zone H3. [24] It is very easy to grow in a Mediterranean climate in sheltered positions. [7]
The hanashōbu (ハナショウブ, 花菖蒲, Iris ensata var. ensata , syn. I. ensata var. hortensis I. kaempferi) grows in the wet land and is the most extensively cultivated variety in Japanese gardens. According to the place where it was cultivated, it is classified into the Edo (Tokyo), Higo (Kumamoto Prefecture), Ise (Mie Prefecture ...
Iris laevigata, known as Japanese iris, [1] rabbit-ear iris, [2] or shallow-flowered iris [3] (Japanese: kakitsubata カキツバタ), is a species of flowering plant in the family Iridaceae, native to Japan. It is related to other members of Iris subgenus Limniris, including other species of Japanese irises.
Iris ensata, the Japanese iris [1] or Japanese water iris (Japanese: hanashōbu), formerly I. kaempferi, is a species of flowering plant in the family Iridaceae, native to Japan, China, Korea and Russia, and widely cultivated as an ornamental plant. "Japanese iris" may also refer to I. sanguinea and I. laevigata, both native to Japan.
Iris sanguinea is a rhizomatous flowering plant in the genus Iris and in the series Sibiricae. It is cultivated as an ornamental plant in temperate regions. It is one of the species considered a Japanese iris. It is from Asia, found between Russia, Mongolia, China, Japan and Korea. It has grey green leaves, an unbranched flowering stem and ...