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

Note: Our last day of shipping is Tuesday, 6/18. After that, all orders will be held until late August/early September.

Please place any orders before Monday at 2pm EST to have them ship on Tuesday. Thank you!


We will ship your plants within nine days of placing the order, on either a Monday or a Tuesday. We ship early in the week to ensure that plants do not get stranded in transit over the weekend. You'll receive a tracking number when your order ships.

We appreciate your patience while our small team works to get these live plants to you safely.


    If you need your plants shipped a specific week, please make a note on the Cart page before placing the order, or reply to your order confirmation email. Thank you!

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    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.