North America Native Plant

Onehair Mountainmint

Botanical name: Pycnanthemum monotrichum

USDA symbol: PYMO

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Onehair Mountainmint: Virginia’s Aromatic Native Gem Meet onehair mountainmint (Pycnanthemum monotrichum), a delightful native perennial that’s been quietly charming Virginia gardens with its aromatic foliage and pollinator-friendly blooms. This lesser-known member of the mint family deserves a spot in every native plant enthusiast’s garden – and here’s why. A True ...

Onehair Mountainmint: Virginia’s Aromatic Native Gem

Meet onehair mountainmint (Pycnanthemum monotrichum), a delightful native perennial that’s been quietly charming Virginia gardens with its aromatic foliage and pollinator-friendly blooms. This lesser-known member of the mint family deserves a spot in every native plant enthusiast’s garden – and here’s why.

A True Virginia Native

Onehair mountainmint is a proud Virginia native, naturally occurring in the state’s Blue Ridge Mountains region. As a perennial forb (that’s garden-speak for a non-woody flowering plant), this charming species has adapted perfectly to local growing conditions over thousands of years. Being a true native means it plays well with local wildlife and requires minimal fuss once established.

Currently, onehair mountainmint is found exclusively in Virginia, making it a special addition for gardeners who want to showcase their state’s unique botanical heritage.

What Makes It Special

Don’t let the name fool you – onehair mountainmint is anything but plain! This perennial puts on quite a show with:

  • Clusters of small white to pale pink flowers that bloom in summer
  • Wonderfully aromatic foliage that releases a pleasant mint scent when brushed or crushed
  • Compact, tidy growth habit that won’t overwhelm smaller gardens
  • Excellent drought tolerance once established

A Pollinator Paradise

Here’s where onehair mountainmint really shines – it’s absolutely beloved by pollinators! The dense flower clusters provide nectar for bees, butterflies, and a host of other beneficial insects. If you’re looking to create a pollinator-friendly garden, this native mint is a must-have addition.

Perfect Garden Roles

Onehair mountainmint is wonderfully versatile in the landscape. Consider using it in:

  • Native plant gardens as a showcase species
  • Pollinator gardens where it can feed beneficial insects
  • Cottage gardens for its charming, informal appeal
  • Meadow gardens and naturalized areas
  • Border plantings where its compact size won’t overpower neighbors

Growing Conditions and Care

One of the best things about native plants? They’re typically low-maintenance, and onehair mountainmint is no exception!

Light: Full sun to partial shade (though it performs best with at least 6 hours of direct sunlight)

Soil: Well-drained soils are essential. It prefers slightly acidic to neutral pH but isn’t overly picky about soil type.

Water: Drought tolerant once established, but appreciates regular water during its first growing season

Hardiness: Thrives in USDA zones 6-8, making it perfect for most Virginia gardens

Planting and Care Tips

Getting started with onehair mountainmint is refreshingly simple:

  • Plant in spring or fall for best establishment
  • Space plants 12-18 inches apart to allow for natural spreading
  • Water regularly the first year, then step back and let nature take over
  • Deadhead spent flowers to encourage continued blooming
  • Be aware that it can spread by rhizomes – a bonus if you want more plants!
  • Minimal fertilization needed; too much can actually reduce flowering

Why Choose Onehair Mountainmint?

In a world full of high-maintenance garden plants, onehair mountainmint offers something refreshing: natural beauty with minimal effort. It supports local ecosystems, provides food for pollinators, and gives you that wonderful minty fragrance every time you brush past it in the garden.

Plus, there’s something special about growing a plant that’s truly native to your exact region. When you plant onehair mountainmint, you’re not just adding another pretty perennial – you’re helping preserve Virginia’s botanical heritage and supporting the insects and wildlife that depend on native plants.

Ready to add this aromatic gem to your garden? Your local pollinators will thank you, and you’ll have a beautiful, low-maintenance native that celebrates the best of Virginia’s natural flora.

Onehair Mountainmint

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Lamiales

Family

Lamiaceae Martinov - Mint family

Genus

Pycnanthemum Michx. - mountainmint

Species

Pycnanthemum monotrichum Fernald - onehair mountainmint

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA