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...
Where this plant fits
Suitable across 42 ecoregions - 34 climate-resilient through 2070 · 5 suited today · 3 newly possible by 2070. Best matches first.
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
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.
Lady Bird Johnson Wildflower Center Native Plant Database
Botanical research database





