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Virginia Mountain-Mint

Pycnanthemum virginianum

Last reviewed: September 2026

Pycnanthemum virginianum, or Virginia mountain mint, is an upright forb with clusters of small white flowers blooming July through September. It grows well in full sun to part shade with medium moisture soil and draws bees, butterflies and wasps.

Virginia Mountain-Mint (Pycnanthemum virginianum)
Photo: (c) Brandon Corder, some rights reserved (CC BY)

Toxicity unknown

Virginia Mountain-Mint (Pycnanthemum virginianum) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

full sun

Water

medium

Size

24"–36" H × 12"–24" W

Bloom

Jul, Aug, Sep

Native to

AL, AR, CT, DE and 27 more states

Pollinators

bees, butterflies, wasps

Deer

Resistant (per Prairie Moon Nursery)

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Mountain Mint is a fragrant native perennial that forms neat clumps of aromatic foliage topped with clusters of small white flowers. The silvery-white bracts surrounding the flower heads create an attractive display from summer into fall. This hardy plant spreads slowly by rhizomes and tolerates drought once established.

Growing Virginia Mountain-Mint

Grow Virginia Mountain-Mint in full sun and medium water. Mature plants reach 24 to 36 inches tall and spread 12 to 24 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

How to care for Virginia Mountain-Mint, by region

How to care for Virginia Mountain-Mint where it is actually grown: year-round basics plus what to do each season, region by region, with the sources for each.

Care guidance last updated: August 2026

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Northern Allegheny Plateau (includes Binghamton, NY)

Year-round

Virginia mountain mint is native to the Binghamton area's moist meadows and settles in fast, then spreads by rhizome once it's happy.

  • Water regularly through the first growing season while roots establish.
  • Once established it's drought tolerant and rarely needs supplemental watering here.
  • Mulch 2 to 3 inches to hold moisture and buffer the freeze-thaw cycles common in the Southern Tier.
  • It spreads by underground rhizomes and can be aggressive in moist, rich soil. Give it room or a root barrier.
  • The most common mistake is planting it in a small front bed with no plan for its spread. It will outgrow a tight border in a season or two.

Edge the planting or set a buried root barrier around it in a front bed so it stays inside the bed line instead of spreading into the lawn or walkway, which keeps it looking intentional rather than overgrown.

Fall

Fall brings the first frosts to Binghamton, usually by mid to late October, and this is a season to leave the plant alone rather than tidy it.

  • Leave seed heads and stems standing through fall instead of cutting back.
  • Standing stems and seed heads protect overwintering insects through the coming winter.
  • Reduce watering as the plant goes dormant with the season's first hard frost.
  • This is not a good season to divide. Wait for spring instead.

Winter

Binghamton winters are cold and snowy, and this plant handles them by dying back to the roots and waiting it out.

  • Foliage dies back completely to the ground by winter.
  • Leave the dead stems standing through winter for insect habitat rather than cutting back in fall.
  • Cut the old stems back in very early spring, before new shoots appear, if you want a tidier restart.
  • No extra winter mulching is required beyond what's already on the bed. It's hardy through Southern Tier winters.

Spring

Spring arrives late in Binghamton, and this is when new shoots push up from the roots.

  • New growth appears once soil warms, usually April into May, after the last frost.
  • Divide congested clumps now if you want to control spread or share starts.
  • Plant new starts in spring so they have a full season to establish before winter.
  • No fertilizer needed. It grows well in average garden soil.

Summer

Summer is peak season, with fragrant foliage and a long bloom of small white flowers that draw a steady stream of pollinators.

  • Blooms run July into August with small white flowers in dense clusters.
  • Deadhead spent flower clusters if you want to extend bloom and keep the bed looking tidy.
  • Water during dry spells. Southern Tier summers can have short dry stretches even though the region is generally humid.
  • Expect heavy bee and butterfly visits to the flowers during bloom.

Sources: Lady Bird Johnson Wildflower Center - Pycnanthemum virginianum, Missouri Botanical Garden Plant Finder - Pycnanthemum virginianum

Want these tasks as reminders timed to your yard? Pollinator Patch turns this guidance into a season-by-season care plan for the plants you actually grow.

In an HOA neighborhood

Virginia Mountain-Mint is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.

Works well in: front yard, foundation, street edge, mid zone.

  • May spread beyond intended area if not managed

Wildlife value

This plant is exceptionally valuable for pollinators, attracting numerous species of native bees, beneficial wasps, and butterflies throughout its long bloom period. The dense flower clusters provide abundant nectar and the seeds feed birds in winter.

Common questions

When does Virginia Mountain-Mint bloom?
It typically blooms from July through September, producing dense clusters of small white flowers with faint purple spotting atop square stems.
What pollinators visit Virginia Mountain-Mint?
Bees, butterflies and wasps are frequent visitors, drawn to the abundant nectar in its tight flower clusters throughout the summer bloom period.
What growing conditions does Virginia Mountain-Mint prefer?
It does best in full sun to partial shade with medium soil moisture, though established plants can handle both drier spells and periodically wetter ground.
What kind of plant is Virginia Mountain-Mint?
It is a rhizomatous herbaceous perennial forb in the mint family, with narrow leaves and square stems that spread to form colonies in meadows and prairie plantings.
Is Virginia Mountain-Mint HOA-friendly?
Virginia Mountain-Mint is generally an HOA-friendly choice in the right placement, with low maintenance.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

See all plant problem guides

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