Carex japonica, commonly known as East Asian sedge, is a perennial herbaceous plant native to moist, shaded forest floors and along streams in East Asia, including Japan, Korea, and parts of China. This sedge typically forms dense clumps reaching 10 to 18 inches (25 to 45 cm) in height and width. It features arching, bright green leaves that add fine-textured contrast to garden plantings. East Asian sedge produces inconspicuous brown flower spikes in the late spring, though it is primarily grown for its foliage rather than its flowers.

East Asian sedge is valued for its ability to thrive in shady conditions where other plants may struggle. It is often utilized as a ground cover, in border plantings, or in woodland gardens. This sedge prefers consistently moist, well-drained soils rich in organic matter and benefits from regular watering, especially during dry periods. It is tolerant of a range of light conditions from full shade to partial sun. East Asian sedge is relatively low maintenance, but it may require division every few years to maintain vigor. It is not typically associated with serious disease or pest problems, making it a reliable choice for gardeners seeking a shade-tolerant ornamental grass.CC BY-SA 4.0