Pycnanthemum tenuifolium Narrowleaf Mountain Mint



Pycnanthemum tenuifolium has very fine, almost needle-like leaves on hairless, erect, branched stems that are 2’-3’ tall. Its tiny white flowers with two purple spots are produced in terminal clusters and open over an extended period, from middle summer into early fall. It has a very strong mint aroma when crushed. Like the other Mountain Mints, it spreads via rhizomes to form attractive colonies.

Pycnanthemum tenuifolium, also known as Narrowleaf (or Slender) Mountain Mint, has a wide natural range, found from Texas to Nebraska, northeastward into Canada and southeast to Florida. It is endemic to dry, open woods, dry prairies and fields as well as along roadsides, streams and in wet thickets.

Pycnanthemum tenuifolium prefers full sun to part shade and, unlike most Mountain Mint, dry to medium moist soils. It tolerates a wide range of soils and is happy in dry to damp situations. Great for naturalized areas and rain gardens. Definitely a pollinator favorite!


  • Common Names: Narrowleaf Mountain Mint, Slender Mountain Mint
  • Zones: 4-8
  • Light Requirements: Full Sun to Light Shade
  • Soil Preference: Prefers average to dry soil
  • Height at Maturity: 24-36
  • Width at Maturity: 24-30
  • Bloom Color: White/Cream
  • Bloom Time: Midsummer to early fall

Special Features

  • Attracts: Butterflies. Pollinators.
  • Tolerates: Drought.
  • Other Features: Container Plant. Cut Flower. Fragrant.

Care and Growing Tips

Check out our blog for more gardening tips!

Shipping Info


All orders placed now will be held until late August/early September when our fall shipping season begins. We stop shipping plants every summer due to the high temperatures. We appreciate your patience!

If you'd like to receive your order before our fall season, you can leave a note for us on the Cart page before you reach checkout. Please note that we will have to wait for a window of cooler temperatures to ship. We cannot promise any particular shipping date during the summer. 


plants shipped to your door

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We ship via UPS or USPS (the Post Office), and their ship rates are automatically generated through our site. We do not profit on shipping costs. We are working with these providers to get our customers the best rates possible.

All ship times are subject to change if extreme weather conditions are present here at the nursery or at the shipping destination.

Please note: Depending on the time of year, the foliage of the plants may be trimmed to fit into our shipping boxes. This could delay the flowering of the plant, but many perennials actually benefit from being cut back.

We are currently not able to ship to Puerto Rico, Hawaii, and outside of the US.