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Rough blazing star

Rough blazing star

Liatris aspera
The blazing star of dry, sandy and rocky ground: a prairie, glade and savanna perennial whose stiff stems carry rounded, button-like rose-purple flower heads spaced apart along the spike, opening from August into October, later than most Liatris. Where dense blazing star wants a moist meadow and prairie blazing star copes with damp soil, this one is the drought-tolerant choice for lean, sharply drained sites.
Native: 27 US states + 2 CA provinces
Climate fit: broad (87/100)
Pollinator
Border
Light
Full sun / Part shade
Water
Low water
Mature size
2-3 ft tall · 15" apart
Hardy in zones
3a-8b
brutally cold to frosty winters
Life cycle
Perennial
Bloom period
Summer / Fall
Native in Illinois
Yes

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Native across 29 US states and Canadian provinces - a wide-ranging part of North America's plant communities.

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
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
✓
Well-suited today and still thriving 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...

Similar plants

Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
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Border
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Focal point
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Cardinal flower (Lobelia cardinalis) whole-plant habit on a shaded streambank, showing erect unbranched scarlet flower spikes above a basal clump of lance-shaped leaves.
Lobelia cardinalis
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A short-lived native perennial of wet woodland edges, stream banks, and ditches across the Americas, named for the brilliant scarlet-red flowers that rise on erect, unbranched terminal spikes from mid-to-late summer. Each tubular, two-lipped bloom is shaped for the hummingbird tongue - the plant depends on ruby-throated hummingbirds for pollination because most insects cannot work the long flower tube. It demands constant moisture and tolerates brief flooding, but its foliage carries alkaloids that are very toxic to humans if eaten.
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Full sun / Part sun / Part shade
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Climate: broad
Focal point
Pollinator
Border
Foxglove beardtongue (Penstemon digitalis) clump, its upright 24 to 35 inches stems topped with open, branched panicles of white tubular flowers.
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Foxglove beardtongue
A native upright perennial of central + eastern North American prairies, woodland margins, and open woods producing tall vertical spires of white tubular flowers in late spring. The species name "digitalis" honors a flower-shape resemblance to true foxglove (Digitalis purpurea) - but Penstemon digitalis is NOT toxic in the same way (NC State explicit: "lacks the toxicity associated with foxglove"). Specialist Penstemon mason bee (Osmia distincta) relationship per NC State. The popular 'Husker Red' cultivar adds burgundy foliage for foliage-color design.
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Pollinator
Border
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Golden alexanders
A clump-forming native perennial of the carrot family that opens flat-topped, compound umbels of tiny golden-yellow flowers in late spring, when little else is blooming. The toothed, twice-divided-in-threes (biternate) foliage and the bare central flower stalk on each umbel set it apart from other umbellifers. A documented larval host for the black swallowtail and an early-season nectar and pollen source for short-tongued native bees.
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Hardy hibiscus (Hibiscus moscheutos) in flower: a large saucer-shaped bloom with broad overlapping petals and a contrasting central eye around a prominent columnar staminal tube, above broad green leaves.
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A bold, moisture-loving native perennial of eastern North America that dies back to a woody base each winter and returns to throw up stout 2 to 6 feet stems topped with enormous 4-8 inch saucer-shaped flowers - white, pink, red, or burgundy, each with a contrasting central eye - from June into September. NC State Extension describes a herbaceous perennial hardy across USDA zones 4a-9b that thrives in wet to constantly moist soils, tolerates heat, humidity, and even brief flooding, and draws hummingbirds, butterflies, and other pollinators. The tropical-looking dinner-plate blooms make it a dramatic focal point for rain gardens, pond edges, and the back of a sunny border. The two botanical authorities cited on this page disagree about its name: Kew's World Checklist splits it into a separate genus as Muenchhusia moscheutos, while GBIF still treats Hibiscus moscheutos as the accepted name. That split is recent and neither nurseries nor breeders have followed it, so Hibiscus moscheutos is the name used here.
Perennial
Full sun / Part shade
Consistent moisture
Zones 4a-9b
Climate: broad
Focal point
Border
Structure
Pollinator

Educator packet

Plant packet
Rough blazing star educator packet
The blazing star of dry, sandy and rocky ground: a prairie, glade and savanna perennial whose stiff stems carry rounded, button-like rose-purple flower heads spaced apart along the spike, opening from August into October, later than most Liatris. Where dense blazing star wants a moist meadow and prairie blazing star copes with damp soil, this one is the drought-tolerant choice for lean, sharply drained sites.
Scientific name
Liatris aspera
Plant type
perennial
Hardiness
3a-8b
Light
full-sun, part-shade
Moisture
low
Spacing
15"
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). Rough blazing star (Liatris aspera). Retrieved 2026, October 18, from https://plotwright.com/plants/liatris-aspera
Sources used for this record
This record is compiled from the sources below.
NC State Extension Gardener Plant Toolbox
University extension service
Missouri Botanical Garden PlantFinder
Botanical research database
Lady Bird Johnson Wildflower Center Native Plant Database
Botanical research database
USDA PLANTS Database
Government data source
Plants of the World Online (POWO)
Botanical research database
GBIF
Botanical research database
Wikipedia (ecoregion articles)
Botanical research database
Wikimedia Commons
Photo · CC BY 2.0