Cold hardiness

Future

2050

2100

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

USDA

Published baseline for this location from 1991-2020.

Source: USDA Plant Hardiness Zone Map 2023 (1991-2020 climatology) via ArcGIS FeatureServer

Well-suited

2050

Zone 7a

Plotwright

Projected zone for this same location in 2050 (2041-2070) using SSP3-7.0 (regional rivalry).

Well-suited

In plain terms: This location is in Zone 6b today. Its hardiness profile is cold winters, and coldest nights are typically around -3°F. By 2050, the projected hardiness zone is Zone 7a based on SSP3-7.0 (regional rivalry). That is a +0.5-zone shift from Zone 6b to Zone 7a by 2050.

✓

Well-suited today and still thriving in 2050.

Heat tolerance

Future

2050

2100

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 41 ecoregions — 40 climate-resilient through 2070 · 1 suited today. Best matches first.

Appalachian mixed mesophytic forests

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Appalachian-Blue Ridge forests

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Arizona Mountains forests

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Atlantic coastal pine barrens

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Blue Mountains forests

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Canadian Aspen forests and parklands

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Central Pacific Northwest coastal forests

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Central Tallgrass prairie

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Central-Southern Cascades Forests

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Chilean Matorral

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What it needs

Conditions

Light

Full sun

Water

Moderate water

Spacing

24"

Habit

Tall upright clumping native warm-season tallgrass

Care tips

•

Give it room + full sun — at 4-8 feet it anchors the back of a prairie planting.

•

Lean soil and restrained water keep the tall culms upright; rich, wet sites make it flop.

•

Cut back in late winter before new shoots emerge; leave standing through winter for cover + structure.

Lifecycle

Planting

Plant in spring or early fall in full sun in average, well-drained soil. Tolerates clay and dry soil once established; deep roots make it drought- and erosion-resistant.

Transplanting

Divide established clumps in spring before growth resumes; keep mulch off the crown.

Early growth

Water through the first season to establish. Skip rich fertility and excess water in lean sites — overly fertile conditions make the tall culms flop.

Maturity

Mature clumps reach 4-8 feet with purplish-red "turkey-foot" racemes in late summer and maroon-tan fall-into-winter color. Cut back in late winter before new growth.

Propagation

Seed is the standard propagation path; divisions also work for named selections.

Pollination

Wind-pollinated

Wind-pollinated like most grasses — big bluestem produces dry powdery pollen and does not feed bees or butterflies with nectar. Its habitat value is elsewhere: a larval host for skipper butterflies and a cover + seed plant for prairie songbirds.

Plants don't grow alone

Larval host

Specialist

Butterfly

Skipper butterflies (Hesperiidae (family-level entry))

Warm-season-grass specialist host — the Lady Bird Johnson Wildflower Center documents big bluestem as a larval host for the Delaware Skipper and Dusted Skipper. Planting native warm-season grasses is the single most effective way to support skipper populations.

Seed forage

Bird

Eastern songbirds (multi-species) (multiple species (Passeriformes))

Provides cover for at least 24 songbird species and nesting sites or seed for Grasshopper Sparrow, Henslow's Sparrow, Sedge Wren, and Western Meadowlark (Lady Bird Johnson Wildflower Center).

Shelter / habitat

Bee

Stem-nesting native bees (multiple genera (Ceratina, Hylaeus, Osmia, etc.))

Standing clumps and stems provide nesting materials and overwintering structure for native bees.

For people

Not eaten by humans

A native tallgrass-prairie grass grown for ornament, erosion control, and wildlife habitat — and historically a premier rangeland forage grass — but not a human food crop.

Native range

Native across 44 US states + 4 CA provinces.

AHS heat range

4-12

Native ecoregions

Naturally belongs in 29 ecoregions — its native range crosses a state or province each one spans (not necessarily this exact habitat).

Appalachian mixed mesophytic forests

›

Appalachian-Blue Ridge forests

›

Arizona Mountains forests

›

Atlantic coastal pine barrens

›

Canadian Aspen forests and parklands

›

Central Tallgrass prairie

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Chihuahuan desert

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Colorado Rockies forests

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Cross-Timbers savanna-woodland

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Eastern Canadian Forest-Boreal transition

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Climate notes

•

Missouri Botanical Garden PlantFinder lists Andropogon gerardii for USDA zones 4-9 in full sun and dry-to-medium moisture; the Lady Bird Johnson Wildflower Center documents it native across 40+ US states and into south-central Canada (MB, ON, QC, SK).

•

The dominant grass of the tallgrass prairie — deep-rooted and drought- and erosion-resistant once established, though it wants more moisture than little bluestem to look its best. Tolerates dry soil, black walnut, and urban conditions.

•

Native from southern Canada through the Great Plains into Texas and the Gulf states, persisting into the most extreme summer climates of the southern Plains.

In the designer

Growth over time

48-96" tall · 24-36" spread

Mature clump with full turkey-foot seedheads + fall color.

Design roles: Structure · Pollinator

Seasonal interest

Spring

Summer

Fall

Winter

Filled = the plant has seasonal interest · ▾ now = your current season

Big bluestem

At a glance

Related products

Why it matters

Cold hardiness

Heat tolerance

Where this plant fits

What it needs

Lifecycle

Pollination

Plants don't grow alone

For people

Native range

Climate notes

In the designer

Seasonal interest

Sources & citations