Wild lupine (Lupinus perennis) — Plotwright

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Wild lupine

Habit (mature) · Douglas Goldman / Wikimedia Commons · CC BY-SA 4.0

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Wild lupine

Lupinus perennis

The native sundial lupine of eastern North American sand barrens and oak savannas — erect 1-2.5-foot stems carry showy spring spikes of blue, pea-shaped flowers above palmately divided leaves of 7-11 radiating leaflets. A nitrogen-fixing legume of dry, sandy, acidic soils, it is the sole larval host for the federally endangered Karner Blue butterfly and the Frosted Elfin, and carries the Xerces Society "special value to native bees and bumble bees" flag.

Native: 30 US states + 2 CA provinces

Review: Source-backed

Climate fit: broad (83/100)

Pollinator

Border

Filler

Light

Full sun / Part shade

Water

Low water

Mature size

12-30" tall · 12" apart

Hardy in zones

3a-8b

brutally cold to frosty winters

Summer heat range

Cool-Hot

cool to hot 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 Karner blue and 2 other species — specialist wildlife that depend on plants like this to reproduce.

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

°C

°F

Loading current AHS heat-zone and plant heat-fit data at your coordinates…

Where this plant fits

Suitable across 40 ecoregions — 35 climate-resilient through 2070 · 5 suited today. Best matches first.

Appalachian mixed mesophytic forests

Appalachian-Blue Ridge forests

Arizona Mountains forests

Blue Mountains forests

Canadian Aspen forests and parklands

Central Pacific Northwest coastal forests

Central Tallgrass prairie

Central-Southern Cascades Forests

Colorado Rockies forests

Cross-Timbers savanna-woodland

Pollination

Self-incompatible

Bee-pollinated — the Lady Bird Johnson Wildflower Center flags Lupinus perennis with "special value to native bees" and "special value to bumble bees," and both LBJ and NC State Extension note it attracts bees, butterflies, and hummingbirds. The keeled pea flowers are tripped open by the weight of larger bees (bumble bees and other long-tongued natives), which carry pollen between plants.

Plants don't grow alone

Larval host

Specialist

Butterfly

Karner blue (Plebejus melissa samuelis)

Larval host

Butterfly

Cloudless sulphur (Phoebis sennae)

Larval host

Butterfly

Eastern tailed-blue (Cupido comyntas)

Nectar forage

Bird

Ruby-throated hummingbird (Archilochus colubris)

Both NC State Extension and the Lady Bird Johnson Wildflower Center list wild lupine as attracting hummingbirds.

Pollen forage

Bee

Leafcutter bees (Megachile spp.)

Pollen forage

Bee

Common eastern bumblebee (Bombus impatiens)

The Lady Bird Johnson Wildflower Center flags Lupinus perennis with "special value to bumble bees" and "special value to native bees"; bumble bees are heavy enough to trip the keeled pea flowers open and are primary pollinators.

Pollen forage

Bee

Sweat bees (Lasioglossum spp.)

Carries the Lady Bird Johnson Wildflower Center "special value to native bees" flag; small native sweat bees (Lasioglossum and relatives) work the spring flowers for pollen.

Seed forage

Bird

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

The Lady Bird Johnson Wildflower Center notes birds and small mammals eat the seeds (which are toxic in quantity to mammals but foraged by wildlife).

Shelter / habitat

Beetle

Common eastern firefly (Photinus pyralis)

For people

Toxic — do not consume

Wild lupine is grown for habitat and ornament, not food. The Lady Bird Johnson Wildflower Center notes the seeds contain alkaloid toxins and are poisonous if consumed in large quantities, and NC State Extension lists the plant as poisonous to humans and pets. Do not confuse it with edible domesticated lupin crops.

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). Wild lupine (Lupinus perennis). Retrieved 2026, June 5, from https://plotwright.garden/plants/wild-lupine

Sources for every fact

Every fact on this page traces to a source. 18 fields cited — 18 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

Lady Bird Johnson Wildflower Center Native Plant Database

Botanical research database

Community photos

The photos above are our reviewed reference set, curated for accuracy.

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