Juncus patens

Common Names

California Gray Rush, Spreading Rush, California Grey Rush, Common Rush

Summary

California Gray Rush, Commonly called California Gray Rush, Juncus patens, is a West Coast native evergreen perennial that forms dense upright clumps about 2–3 feet tall and 2–3 feet wide, with slender gray-green stems and blue-green foliage. It spreads by rhizomes to enlarge colonies and bears flowers along the stems in summer; natural habitats include moist seeps, riparian zones, stream beds, wetlands, and marshes.

Preferring full sun to partial shade, it thrives in moist to wet soils but tolerates a range from low to moist with extra water in summer; once established, it is drought tolerant. It is cultivated for traditional and wildlife gardens, natural landscaping, and habitat restoration, and has practical uses in erosion-control plantings, near water features, rain gardens, borders, containers, mass plantings, and small-space plantings; it may spread by rhizomes and should be managed to prevent invasiveness. Hardiness typically spans USDA zones 7a–9b; maintenance includes removing dead or shabby foliage in late winter.

Lifecycle

Perennial

Height

1-3 feet

Spread

12-36 inches

Hardiness Zones

Zones 4-9

Sunlight Requirements

Full Sun to Full Shade.

Soil Type

Moist, well-draining loam soil

Soil Drainage

Consistently moist, boggy or marshy soils.

Soil pH

5.5-7.0, no single ideal; tolerates acidic to neutral pH (around 7)

Bloom Color

Insignificant

Bloom Time

Spring to Fall

Foliage Color

Blue Green, Grey Green

Fall Foliage Color

Green

Leaf Lifecycle

Other

Growth Rate

Fast

Seasons of Interest

Spring, Summer, Fall, and Winter

Propagation Methods

Division

Attracts Wildlife

Attracts birds