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Switchgrass
Habit (mature) · Cultivar 'Rotstrahlbusch' · David J. Stang / Wikimedia Commons · CC BY-SA 4.0
Limited coverage
Switchgrass
Panicum virgatum
A native warm-season tallgrass-prairie grass for vertical structure, four-season movement, late-season color, and winter bird forage.
Native: 47 US states + 5 CA provinces
Review: Source-backed
Climate fit: broad (76/100)
Structure
Focal point
Light
Full sun / Part sun
Water
Moderate water
Mature size
36-84" tall · 36" apart
Hardy in zones
5a-9b
very cold to frosty winters
Summer heat range
Mild-Extreme
mild to extreme summers Interim Plotwright tier until the plant AHS range is authored.
Native in Illinois
Yes
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A documented larval host for the Skipper butterflies — caterpillars feed on its foliage before becoming the next generation.
Wildlife relationships
Cold hardiness
Now
Zone 6b
USDA
Chicago, IL · 1991-2020 average annual coldest day
Source: USDA Plant Hardiness Zone Map 2023 (1991-2020 climatology) via ArcGIS FeatureServer
Well-suited
2050
Zone 7b
Plotwright
Your zone + climate-model shift · SSP3-7.0 (regional rivalry)
Well-suited
In plain terms: cold winters — coldest nights typically around -3°F.
Well-suited today and still thriving in 2050.
Heat tolerance
Loading current AHS heat-zone and plant heat-fit data at your coordinates…
Appears in collections
+4
Collection · 8 plants
Climate-resilient natives for warming zones (eastern NA)
A pollinator-supporting palette of eastern NA natives whose USDA zone range and broad continental distribution score high on the climate-resilience composite. Every plant tolerates 6-7 USDA zones and is native across 15+ US states + multiple Canadian provinces. Holds up under the SSP3-7.0 mid-century projection without the gardener trading wildlife value for resilience.
Switchgrass
Little bluestem
Common milkweed
Black-eyed Susan
Wild bergamot
Sweet Joe-Pye weed
Cutleaf coneflower
New England aster
Collection · 4 plants
Sunny pollinator border
A durable sunny border with summer bloom, seedheads, and upright winter texture.
English lavender
Purple coneflower
Black-eyed Susan
Switchgrass
Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Switchgrass (Panicum virgatum). Retrieved 2026, June 5, from https://plotwright.garden/plants/switchgrass
Sources for every fact
Every fact on this page traces to a source. 18 fields cited18 source-backed.
NC State Extension Gardener Plant Toolbox
University extension service
Backs 17 fields
Identity
Summary
Plant type
Light
Moisture
Hardiness
Heat zone
Size
Spacing
Habit
Design roles
Seasonal interest
Growth stages
Lifecycle
Regional guidance
Success tips
Designer notes
Wikimedia Commons
Photo · CC BY-SA 4.0
Backs 1 field
Image
Community photos
The photos above are our reviewed reference set, curated for accuracy.
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