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Carex oshimensis 'Evergold' (Variegated Japanese Sedge) - A clumping forming evergreen sedge to 12 to16 inches tall by about 20 inches wide with arching narrow leaves that have a creamy yellow central stripe and dark green margins. In later winter appear the brownish insignificant flowers that rise not much above the foliage before arching downward and are best trimmed off with an annual cut back of the plant in spring.
Plant in part cool sun to light shade and irrigate regularly to occasionally, allowing the soil to dry slightly between watering - surprisingly drought tolerant for a sedge. Cold hardy to about 0 degrees F. It is very striking as an accent plant or ground cover, in rock gardens and in mass plantings in a morning sun or bright shady location. Also useful on the edge of the water garden but dislikes complete submersion. It is on lists as resistant to predation by deer.
This sedge, first described in 1914 by the Japanese botanist Takenoshin Nakai, is native to dry forested areas and rocky slopes at mid elevations on the main island of Honshu in Japan. There has been much confusion surrounding the cultivar and numerous names have been applied to it. We originally grew this plant as Carex morrowii 'Old Gold' starting in 1987 and later as Carex morrowii 'Aureo-variegata' . Carex morrowii is a valid name for a sedge that also grows in Japan but following the treatment in Rick Darke's book, "The Color Encyclopedia of Ornamental Grasses" and the New Ornamentals Society listing on Carex, we corrected the name we used for this plant to Carex oshimensis 'Evergold' in our 2004 catalog and we continued to grow it until closing the nursery in . We also long grew the white-margined cultivar Carex oshimensis Everest.
Information displayed on this page about Carex oshimensis 'Evergold' is based on our research conducted about this plant in our nursery library as well as from information provided by reliable online resources. We also include our own observations made about it as it has grown in the nursery gardens and other gardens visited, as well how the crops of this plant performed in the containers in our nursery field. We will also include comments received from others and welcome hearing from anyone who has information about this plant, particularly if it includes cultural information aiding others to better grow it.
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