Home
Crimson fountain grass

Crimson fountain grass

Pennisetum setaceum
A showy, tender, clump-forming fountain grass grown for its long, soft, nodding, foxtail plumes in pink to purple that arch above mounding foliage all summer and fall - most striking in the burgundy-leaved forms ('Rubrum', 'Fireworks') that anchor summer containers and bedding. Its accepted botanical name is now Cenchrus setaceus, though gardeners still know it as Pennisetum setaceum. HONESTY: the green-leaved species is one of the world's most serious invasive grasses - a fire-promoting noxious weed that has overrun wild land in California, Hawaii, Arizona, and beyond, and is banned or restricted in several places - so grow ONLY the sterile burgundy cultivars, never the seeding green species. Frost-tender (zone 9 and up), it is grown as a summer annual in cold climates.
Climate fit: narrow (21/100)
Container
Border
Focal point
Light
Full sun
Water
Low water
Mature size
3-5 ft tall · 24" apart
Hardy in zones
9a-11
frosty to nearly frost-free winters
Native in Illinois
No
Grown purely as an ornamental for its foliage and plumes.

Cold hardiness

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Won't grow here
Zone 7a
Plotwright
0°F to 5°F
Won't grow here
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
Out of range today and still out of range in 2050.

Heat tolerance

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...

Where this plant fits

Suitable across 4 ecoregions - 3 climate-resilient through 2070 · 1 newly possible by 2070. Best matches first.

Plant this, not that

Better fit for this place
For Chicago, IL, these are replacement suggestions: similar plants with a stronger hardiness fit now and/or in 2050.
Two pure white Easter lily (Lilium longiflorum) flowers held horizontally, each a long narrow trumpet flaring into six waxy recurved lobes, with a green-white style and bright yellow anthers inside. Rain droplets stand on the petals; a third unopened trumpet points away behind, over dark foliage.
Lilium longiflorum
Easter lily
Easter lily reaches most people the way almost nothing else in this catalog does: as a forced gift plant in a foil-wrapped pot, in full white trumpet in March or April, months before its real season. Left to itself in a garden Lilium longiflorum flowers in July and August, and Missouri Botanical Garden files it under the plainer name trumpet lily. Everything about the pot version is engineered - bulbs lifted in autumn from a narrow strip of the California and Oregon coast, cooled, potted, held under a temperature schedule that lands the buds on a date that moves by up to five weeks a year, and kept short with growth retardants. That is why the plant you were given is 16 to 20 inches tall and the same plant in the ground is 2 to 3 feet. The single most important sentence in this record is not horticultural. This is the species behind the veterinary literature on feline lily poisoning: every part of it, including the pollen and the water in the vase, causes acute kidney injury in cats, less than one leaf can be enough, and untreated cases die in 36 to 72 hours. It is also the lily that enters houses in quantity, which is the whole problem. If there is a cat in the house, this plant does not come in the door. Beyond that, be clear about what it is not. It is not a hardy garden bulb in the way the regal lily in this wave is - Missouri Botanical Garden rates it zone 4 to 8, which is the most generous number in circulation for a subtropical island endemic, and much US extension guidance says 5 to 8. It is not a widespread wild species either: Kew's native range is the Ryukyu Islands, Taiwan, southern Japan and the Philippines, and nothing else. A globally traded flower with a natural range you could drive across in a day.
Perennial
Full sun / Part shade
Moderate water
Zones 4a-8b
Climate: narrow
Focal point
Border
Container
Better fit now and in 2050
Now: well-suited
2050: well-suited

Similar plants

Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
African lily (Agapanthus praecox) - rounded umbels of trumpet-shaped blue flowers on tall bare stalks, strap-shaped arching basal leaves forming a clump, multiple flowering stems in a garden bed showing the perennial's clump-forming habit.
Agapanthus praecox
African lily
A bold, clump-forming evergreen perennial from South Africa, grown for big rounded umbels of trumpet-shaped blue (or white) flowers held on tall bare stalks above arching, strap-shaped leaves in mid-to-late summer. It is widely sold as "lily of the Nile," but that is a misnomer - the plant is South African (the Cape provinces and KwaZulu-Natal), not from the Nile. Spectacular and easy in warm climates, this evergreen Agapanthus is frost-tender, so in cold-winter areas it is grown in a container and overwintered under cover. The RHS has given several Agapanthus praecox forms its Award of Garden Merit and rates this evergreen species half-hardy (H3 - needs winter protection).
Perennial
Full sun / Part shade
Moderate water
Zones 8a-11
Climate: narrow
Focal point
Border
Container
Pollinator
African marigold (Tagetes erecta) - large dense globe-shaped double flower head, deep orange color, finely divided pinnate foliage.
Tagetes erecta
African marigold
A tall, bold warm-season annual from Mexico and Guatemala (the "African" name is a misnomer of its European garden history) grown for large, fully double, pompon-like flowerheads in saturated yellow, gold, and orange over strongly aromatic, finely divided foliage. Plants reach 1 to 4 feet and bloom from early summer to frost in full sun. The petals are edible and used as a culinary garnish and natural dye, and the flowers are the iconic "flor de muerto" of Mexican Day of the Dead. Despite the wide listed zone range it is frost-tender and grown for a single warm season.
Annual
Full sun / Part shade
Low water
Zones 2a-11b
Climate: moderate
Border
Focal point
Container
Pollinator
Autumn-joy stonecrop (Hylotelephium 'Herbstfreude') showing a large, flattened cyme of tiny star-shaped rose-pink flowers and pale buds.
Hylotelephium 'Herbstfreude'
Autumn-joy stonecrop
A clump-forming herbaceous perennial grown for its showy late-season flower heads: masses of tiny star-like flowers borne in flattened cymes 3 to 6 inches across that emerge rosy pink, deepen to rose-red, and fade to coppery-rust as they die. Gray-green, fleshy, succulent-like leaves form upright clumps to about 24 inches. Easily grown in dry-to-medium, well-drained soil in full sun, it is drought tolerant and attracts butterflies, and its foliage and dead inflorescences persist into winter for added interest.
Perennial
Full sun / Part shade
Low water
Zones 3a-9b
Climate: moderate
Border
Focal point
Pollinator
Container
Amaryllis belladonna in bloom: clusters of fragrant pink, funnel-shaped flowers held on bare, leafless stems.
Amaryllis belladonna
Belladonna lily
Amaryllis belladonna, the belladonna lily (also Jersey lily, naked-lady, or March lily), is a bulbous perennial geophyte from the Western Cape of South Africa. It is grown for its dramatic autumn display: leafless stems carry umbels of 6-12 fragrant, funnel-shaped pink to rose flowers that appear before the strap-shaped leaves emerge (a hysteranthous "naked lady" habit). It suits the front-to-mid border, gravel and Mediterranean-style plantings, and large containers in a hot, sheltered, sun-baked spot. Be plain about two cautions: the bulb is only modestly frost-hardy (roughly USDA 8/9-11; RHS H4) and is best given the warmest, driest position available in cooler areas, and ALL parts of the plant are TOXIC, containing lycorine and related Amaryllidaceae alkaloids that cause vomiting and diarrhea if eaten by people or pets. It also naturalizes readily in mild Mediterranean climates, so site it where self-sown spread is welcome.
Perennial
Full sun
Low water
Zones 8b-11
Climate: narrow
Border
Focal point
Pollinator
Container
A spherical scarlet flower head of Scadoxus multiflorus (blood lily), composed of many slender red flowers with protruding stamens, atop an upright leafless stem.
Scadoxus multiflorus
Blood lily
Scadoxus multiflorus, the blood lily (also fireball lily, ball lily, powderpuff lily), is a summer-growing bulbous geophyte in the Amaryllidaceae, native across tropical and southern Africa to the southwestern Arabian Peninsula. Each bulb sends up a leafless stem topped by a dramatic globe-shaped umbel of scarlet flowers with protruding stamens, often before or alongside the foliage. It is a focal-point container and bedding bulb prized for its bold flower head, but it is decidedly tender - RHS rates it H1B (minimum 50 to 59°F), so outside roughly USDA zones 9b–11 it must be grown under glass or as a houseplant and dried off / overwintered frost-free. CRITICAL CAUTION: every part is toxic - Scadoxus contains poisonous alkaloids and has been used as a component of arrow and fishing poisons; the bulbs are ornamental, not edible, and the plant is harmful to people, pets, and grazing animals if ingested. Handle with gloves and keep away from children and animals.
Perennial
Full sun / Part shade
Moderate water
Zones 9b-11
Climate: narrow
Focal point
Container
Border
Blushing bride (Serruria florida) - star-like whorl of papery, pointed white bracts flushed deep pink at the tips, surrounding the flower head, soft silvery-fuzzy central flower mass with slender yellow-tipped styles emerging, fine, needle-like ferny evergreen foliage of the fynbos shrub framing the nodding flower head.
Serruria florida
Blushing bride
A slender, soft, ferny-leaved evergreen fynbos shrub from the Cape Floristic Region of South Africa, treasured for its nodding flower heads ringed with delicate, papery bracts flushed white-to-pink - the traditional Cape "blushing bride" wedding flower. HONESTY (load-bearing): Serruria florida carries a conservation story. It is very rare in the wild, native to only a tiny area of the Cape Provinces (the Franschhoek mountains) and long thought nearly extinct, and it survives largely through cultivation per POWO (Kew). It is also the most demanding member of the protea family in this group and is short-lived, often lasting only 3-5 years. Like all Proteaceae it has cluster (proteoid) roots adapted to nutrient-poor fynbos soils, so it is PHOSPHORUS-SENSITIVE: ordinary phosphate fertiliser or BONE MEAL will KILL it. It needs acidic, extremely sharply drained, sandy soil, full sun, and excellent air movement, and is best grown in a pot or a perfectly drained Mediterranean bed. RHS rates it tender (H3): it is FROST-TENDER and is drought-tolerant once established but resents wet feet. It is grown ornamentally and as a cut flower; it is not edible. Bird and insect visitors work the heads, and in cultivation honey bees forage the nectar.
Shrub
Full sun
Low water
Zones 9a-10b
Climate: narrow
Focal point
Container
Border

Educator packet

Plant packet
Crimson fountain grass educator packet
A showy, tender, clump-forming fountain grass grown for its long, soft, nodding, foxtail plumes in pink to purple that arch above mounding foliage all summer and fall - most striking in the burgundy-leaved forms ('Rubrum', 'Fireworks') that anchor summer containers and bedding. Its accepted botanical name is now Cenchrus setaceus, though gardeners still know it as Pennisetum setaceum. HONESTY: the green-leaved species is one of the world's most serious invasive grasses - a fire-promoting noxious weed that has overrun wild land in California, Hawaii, Arizona, and beyond, and is banned or restricted in several places - so grow ONLY the sterile burgundy cultivars, never the seeding green species. Frost-tender (zone 9 and up), it is grown as a summer annual in cold climates.
Scientific name
Pennisetum setaceum
Plant type
grass
Hardiness
9a-11
Light
full-sun
Moisture
low
Spacing
24 inches
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.

Sources & citations

Cite this page
For lesson plans, articles, or research that uses this page. Use the source cards below to explore the references that informed this record.
Plotwright. (2026, May 17). Crimson fountain grass (Pennisetum setaceum). Retrieved 2026, August 20, from https://plotwright.com/plants/pennisetum-setaceum
Sources used for this record
This record is compiled from the sources below.
Plants of the World Online (POWO)
Botanical research database
RHS Find a Plant
Botanical research database
GBIF
Botanical research database
Wikipedia (ecoregion articles)
Botanical research database
Wikimedia Commons
Photo