Pycnanthemum flexuosum - Appalachian Mountain Mint
Pycnanthemum flexuosum - Appalachian Mountain Mint

Pycnanthemum flexuosum - Appalachian Mountain Mint

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Butterfly FriendlyFull SunDeer ResistantRain GardenPart Shade
Appalachian Mountain Mint
Pycnanthemum flexuosum

An aromatic, summer blooming, herbaceous perennial that produces silvery white, globular flowers on sturdy, upright stems. Blooms for an extended period of time, flowers are prominently displayed above clean, green foliage from summer into fall. A good soil stabilizer, this species spreads via underground stems, but won’t take over the garden. Foliage develops an attractive red tinge in autumn. A larval host plant for the gray hairstreak butterfly; incorporate in the perennial border, rain garden, or near the vegetable garden to entice pollinators. syn. Koellia hyssopifolia

  • Aromatic, summer/fall blooming perennial with cool, fuzzy white flowers
  • Larval host for the gray hairstreak butterfly
  • Resistant to rabbit and deer browsing
  • Spreads via rhizomes but not aggressively
  • Great in helping with soil erosion
  • Fragrant foliage takes on a red tinge along the margin

Native Range

Native to the coastal plain, Pycnanthemum flexuosum occurs in moist savannas and pocosin margins from southeast Virginia into northern Florida. It is common in southeastern North Carolina.

Map Credit: The Biota of North America 
Map Key: Green (native), Teal (native, adventive), Blue (present), Yellow (present & rare), Red (extinct)

Interesting Facts

Beneficial wasps use other insects to house and feed their developing young. Many of the insects these wasps parasitize are considered garden pests, making them an incredibly important ally for gardeners who wish to keep pest populations in check.The vast majority of these wasps are incapable of stinging humans, and since they are so very small, most gardeners aren’t even aware of their presence.




Old flowering stems can be cut to ground level in late winter. 


Mature Size: 2-3ft. Tall x 3-4ft. Wide

Hardiness Zone: 6-8

Sun Exposure: Full Sun to Part Shade

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