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Fountain grass

Cenchrus setaceus

Last reviewed: October 2026

Fountain grass (Cenchrus setaceus)
Photo: (c) Harry Rose, some rights reserved (CC BY)

Toxicity unknown

Fountain grass (Cenchrus setaceus) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

full sun

Water

low

Size

24"–48" H × 24"–48" W

Bloom

Jun, Jul, Aug, Sep, Oct

Native alternatives to Fountain grass

Fountain grass is not native to the United States. These natives fill a similar role in a planting, matched on bloom season, bloom color and mature size.

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Clumping warm-season ornamental grass with fine arching leaves and soft, pink to purple bottlebrush plumes. Native to northeast Africa and the Arabian Peninsula, and known to self-seed readily in mild dry climates.

How to care for Fountain grass, by region

How to care for Fountain grass where it is actually grown: year-round basics plus what to do each season, region by region, with the sources for each.

Care guidance last updated: October 2026

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Central California Foothills and Coastal Mountains (includes San Francisco, CA)

Year-round

Fountain grass is a clumping ornamental grass native to northern and eastern Africa, so it is an introduced plant here. It grows about 3 to 4 feet tall in full sun to part shade, tolerates drought, and spreads readily by seed. It is considered invasive in some southern west coast states.

  • Give it full sun and soil that drains.
  • Water deeply but rarely once established.
  • Cut off the plumes before they shed seed to limit spread.
  • Pull seedlings that appear outside the bed.

Deadheading the plumes keeps it tidy and keeps seedlings out of neighboring yards.

Fall

Fall is the last chance to stop seed from spreading.

  • Cut remaining plumes and bag them.
  • Pull seedlings after the first rains.
  • Hold off on fertilizer.

Winter

The clump rests and needs little care.

  • Rely on rain for water.
  • Leave the dormant foliage until spring cutback if it looks tidy.
  • Check that nothing has seeded nearby.

Spring

Spring is the time to cut the clump back and watch for seedlings.

  • Cut old growth back to a few inches before new leaves emerge.
  • Pull seedlings around the clump.
  • Water new plants weekly until established.

Summer

Plumes appear and begin to set seed.

  • Water deeply every one to two weeks if there is no rain.
  • Remove plumes before they turn fluffy and shed seed.
  • Do not compost seed heads.

Sources: NC State Extension Gardener Plant Toolbox, Cenchrus setaceus (origin, size, light, water, seeding habit)

In an HOA neighborhood

Fountain grass takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: container plantings, contained garden beds.

  • Self-seeds and is considered invasive in some warm, dry regions; deadhead plumes before they shed seed.

Wildlife value

Seed heads are eaten by some birds. Little value to native pollinators and not a host plant for native insects in North America.

Common questions

How much sun does Fountain grass need?
Fountain grass grows best in full sun conditions.
When does Fountain grass bloom?
Fountain grass blooms in June, July, August, September, and October.
Is Fountain grass HOA-friendly?
Fountain grass takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

See all plant problem guides

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