Juncus effusus subsp. pacificus, commonly known as Pacific Rush, is a perennial herb that is part of the rush family and is native to wetlands, riparian zones, and moist grasslands across North America, Europe, Asia, and Africa. It typically grows at a moderate rate to a height of 2-3.5 feet (0.6-1.1 meters) and a width of 1-1.5 feet (0.3-0.5 meters). This plant features cylindrical, green stems and brown or green flowers that are not particularly showy, blooming in the summer. The flowers are clustered in panicles at the stem tips. Pacific Rush is valued for its ability to stabilize soil and its use in water filtration in constructed wetlands.

Pacific Rush is often used in rain gardens, wetland restoration projects, and as an ornamental grass in water features or bog gardens due to its tolerance for wet conditions and its contribution to biodiversity. It is adaptable to full sun or part shade and thrives in medium or slow-draining clay, loam, or sandy soils. It requires medium to high amounts of water, reflecting its natural preference for moist environments. While generally low-maintenance, it can spread aggressively in ideal conditions, potentially becoming invasive in some areas outside its native range.CC BY-SA 4.0