Narrowleaf Mountain Mint (Pycnanthemum tenuifolium)

Common names:
Give a thumbs up Narrowleaf Mountain Mint
Give a thumbs up Narrow-Leaved Mountain Mint
Give a thumbs up Common Horsemint
Give a thumbs up Slender Mountain Mint
Give a thumbs up Virginia Thyme

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Minimum cold hardiness: Zone 2 -45.6 °C (-50 °F) to -42.8 °C (-45°F)
Flower Color: White
Flower Time: Summer
Inflorescence Type: Cluster
Underground structures: Rhizome
Uses: Erosion control
Culinary Herb
Will Naturalize
Wildlife Attractant: Bees
Butterflies
Propagation: Seeds: Sow in situ
Can handle transplanting
Propagation: Other methods: Cuttings: Stem
Cuttings: Root
Pollinators: Various insects
Containers: Suitable in 1 gallon
Suitable in 3 gallon or larger

Flower head hosting selection of pollenators

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Comments:
Posted by Catmint20906 (Maryland - Zone 7a) on Aug 3, 2014 11:50 AM

According to the NPIN, mountain mints have special value to native, bumble, and honey bees, and support conservation biological control by attracting beneficial insects to the garden.

Mountain mints are also considered a key nectar source for monarchs and other butterflies.

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Posted by BrendaVR (Ontario, Canada - Zone 6a) on Aug 23, 2014 8:57 AM

To help differentiate between the two very similar Mountain Mints (P. virginianum and P. tenuifolium), look for slight hairiness on the stem and leaves, or lack thereof.
P. tenuifolium does not have hairs on the stem or leaves (it is glabrous), whereas P. virginianum has this pubescence/hairiness on the stems and leaves. Other than that, their leaf shape/form is nearly identical.

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Posted by Cyclaminist (Minneapolis, Minnesota - Zone 5a) on May 3, 2015 8:19 PM

Unlike Virginia Mountain Mint (Pycnanthemum virginianum), this one doesn't have fragrant leaves, or at least my plants don't. The leaves taste a little bitter, but that's all. But all mountain-mint flowers provide food for short-tongued bees and wasps. Because the flowers are tiny, these insects can reach into them to drink the nectar. A great plant to attract predators that will eat garden pests.

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Plant Events from our members
Catmint20906 On June 4, 2015 Obtained plant
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Discussion Threads about this plant
Thread TitleLast ReplyReplies
Herb? by johioJun 24, 2017 8:25 PM4
White-flowered plant, possible U.S. native by Muddy1Apr 17, 2017 4:25 PM20
plant ID for friend by abhegeDec 1, 2016 9:30 AM15
Would like to have....seeds of... by wcgypsyJun 30, 2017 6:15 PM5
Garden Chat and Photos by Catmint20906Jan 2, 2016 11:47 AM3,043

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