Short-toothed mountain mint (Pycnanthemum muticum) — Plotwright

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Short-toothed mountain mint

Habit (mature) · Alex Abair / Wikimedia Commons · CC BY 4.0

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Short-toothed mountain mint

Pycnanthemum muticum

A clump-forming aromatic native perennial of eastern North America, grown as much for its silvery floral bracts as its bloom — the upper leaves below each flower head turn a frosted, dusty-mint color in summer. Dense flat-topped clusters of tiny two-lipped pinkish-white flowers cover the plant from mid to late summer and are a magnet for bees and butterflies. Unlike the true mints (Mentha), it spreads only modestly by rhizome and is not invasive.

Native: 27 US states

Review: Source-backed

Climate fit: broad (76/100)

Pollinator

Filler

Border

Light

Full sun / Part sun / Part shade

Water

Consistent moisture

Mature size

12-36" tall · 24" apart

Hardy in zones

4a-8b

very 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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Native across 27 US states and Canadian provinces — a wide-ranging part of North America's plant communities.

Lady Bird Johnson Wildflower Center

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-fertile

Insect-pollinated and a standout nectar source: the dense flat-topped flower heads are attractive to a wide range of butterflies and bees (Missouri Botanical Garden PlantFinder), and the Lady Bird Johnson Wildflower Center records Special Value to Native Bees, Bumble Bees, and Honey Bees. Mountain mints are widely cited as among the most productive nectar plants for pollinator gardens.

Plants don't grow alone

Nectar forage

Bee

American bumblebee (Bombus pensylvanicus)

Pycnanthemum is a documented Bombus forage genus (Lanterman Novotny et al. 2023); genus-level inference for this generalist bee.

Nectar forage

Butterfly

Great spangled fritillary (Speyeria cybele)

Nectar forage

Bee

Rusty-patched bumble bee (Bombus affinis)

Nectar forage

Other

Green lacewings (Chrysopidae)

Nectar forage

Bee

Common eastern bumblebee (Bombus impatiens)

The Lady Bird Johnson Wildflower Center flags Pycnanthemum muticum as having Special Value to Bumble Bees; the flat-topped flower heads are a heavily worked nectar source through mid to late summer.

Nectar forage

Bee

European honeybee (Apis mellifera)

The Lady Bird Johnson Wildflower Center flags Special Value to Honey Bees; Missouri Botanical Garden PlantFinder notes the flowers are attractive to bees.

Nectar forage

Bee

Sweat bees (Lasioglossum spp.)

The Lady Bird Johnson Wildflower Center flags Special Value to Native Bees; the shallow, accessible flowers suit small native sweat bees among many other short-tongued visitors.

Nectar forage

Butterfly

Monarch butterfly (Danaus plexippus)

Missouri Botanical Garden PlantFinder records the flowers as attractive to butterflies; mountain mint is a frequently observed late-summer nectar plant for migrating and breeding butterflies.

Nectar forage

Butterfly

Skipper butterflies (Hesperiidae (family-level entry))

Missouri Botanical Garden PlantFinder records the flowers as attractive to butterflies; the dense nectar-rich heads draw skippers along with larger butterflies.

Pollen forage

Bee

Leafcutter bees (Megachile spp.)

Seed forage

Bird

Downy woodpecker (Dryobates pubescens)

Shelter / habitat

Beetle

Lady beetles (Coccinellidae)

For people

Edible with preparation

An aromatic mint-family native whose strongly mint/spearmint-scented foliage is used as a culinary and tea herb; it is grown chiefly as an ornamental pollinator plant rather than a food crop. As with any wild-foraged plant, confirm identity before use.

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). Short-toothed mountain mint (Pycnanthemum muticum). Retrieved 2026, June 5, from https://plotwright.garden/plants/mountain-mint

Sources for every fact

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

Missouri Botanical Garden PlantFinder

Botanical research database

Backs 17 fields

Identity

Summary

Plant type

Light

Moisture

Hardiness

Heat zone

Size

Spacing

Habit

Design roles

Seasonal interest

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Lifecycle

Regional guidance

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Wikimedia Commons

Photo · CC BY 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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