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.
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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.
Better fit now and in 2050
Now: well-suited
2050: well-suited
Better fit now and in 2050
Now: well-suited
2050: well-suited
Better fit now and in 2050
Now: well-suited
2050: well-suited
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.
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.







