Spreading Rush

Year-round

California gray rush is an easy, evergreen clumper that likes sun and handles both wet and dry spots.

• It grows in full sun.
• It tolerates a variety of soils, including slow-draining ones.
• Once settled in, it can get by on about one summer watering a month.
• It is evergreen and the clumps slowly spread over time.
• It handles cold down to about 15 degrees F.

Fall

In fall, it stays evergreen and needs little attention.

• It is evergreen, so the clump keeps its color.
• It is rated easy to care for.

Winter

Winter wet and cold are fine for this rush.

• It tolerates cold down to about 15 degrees F.
• It tolerates slow-draining soil and seasonal flooding.

Spring

In spring, give it sun and let the clump spread at its own pace.

• Full sun suits it.
• It grows in clumps that slowly spread over time.
• It does fine in slow-draining or damp soil.

Summer

Summer water needs are low once it is settled in, though it is happiest where soil stays moist.

• Once settled in, about one summer watering a month is the most it needs.
• It does well in dry areas with minimal summer water.
• In the wild it is usually found where soil stays moist all year.

Year-round

Year-round care for spreading rush around South Lake Tahoe, CA: full sun, flexible soil, and moderate water while it settles in.

• It grows in full sun, and the Saving Water Partnership also lists partial shade.
• It tolerates a variety of soils and does fine in slow-draining spots, and it also works in rain gardens.
• Calscape lists moderate to high water needs, and established plants need at most about one summer watering a month.
• It grows about 1 to 3 feet tall and about 3 feet wide as an evergreen clump.
• Calscape rates the care as easy and lists cold tolerance to 15 F.
• Calscape lists cold tolerance only to 15 F, so treat it as a trial plant where winters are colder than that.

The upright gray-green clumps read as a tidy, intentional accent in a rain garden or border.

Year-round

California gray rush is a California native rush confirmed to occur in Los Angeles County, and its evergreen gray-green clumps hold up well through both LA's wet winters and dry summers once established.

• Plant in full sun to partial shade in soil that drains well but can also handle an occasional soggy spot, such as a low point in a rain garden.
• Water regularly through the first season to help roots establish, then taper to occasional deep watering.
• This rush tolerates the range of soils common in Los Angeles yards, from clay to sandy or decomposed-granite mixes, as long as it is not left bone dry for long stretches.
• Trim only individual brown or damaged stems at the base as needed, this rush stays tidy with very little routine grooming.

Its neat, upright gray-green clumps hold a manicured look year round, an HOA-friendly choice for a front-yard border or rain garden feature.

Fall

Fall is a light-maintenance season for California gray rush in Los Angeles, mostly grooming and easing into the return of winter rain.

• Remove individual dead or browned leaves at the base as needed, this rush needs very little other grooming going into fall.
• Keep up light, occasional watering into fall until winter rains take over.
• Cooling fall temperatures make it a good time to plant new gray rush, since transplants face less heat stress.
• Its low, evergreen clumps add little dry material compared with fall-dormant ornamental grasses, worth noting near structures during Santa Ana wind season.

Winter

Winter is Los Angeles's rainy season, when California gray rush gets most of its water naturally and is due for its biggest grooming of the year if it needs it.

• Let winter rain supply most or all of the water this rush needs during the wet season.
• If a clump looks tired, ragged, or overgrown, cut the entire plant to the ground in late winter to spark vigorous new spring growth.
• This rush tolerates an occasional soggy spot after a storm without issue.
• Hold off on fertilizer through winter, lean soil suits this plant.

Spring

Spring is bloom time for California gray rush in Los Angeles, and a good window for planting as winter rains start to taper off.

• Watch for small, inconspicuous flower clusters near the stem tips from spring into summer.
• Spring is a good, low-stress time to plant new gray rush, using regular water until roots are established.
• As rainfall tapers off through spring, move new plantings onto a regular watering schedule rather than relying on rain alone.
• If a clump looks ragged after winter, trim individual leaves to the ground rather than shearing the whole plant.

Summer

Summer is the driest stretch of the year in Los Angeles, and California gray rush handles it well once established, needing only occasional water.

• Give established clumps occasional deep watering through summer, roughly once a month, more often in fast-draining decomposed granite or sandy soil.
• This rush is well suited to hot, dry summers once established, and is a go-to choice for a summer-dry rain garden design.
• Newer plantings may need more frequent water than fully established clumps during hot summer stretches.
• Skip fertilizer in summer, this rush does fine in lean soil.