Clustered Mountain Mint, Big Leaf Mountain Mint, Short-toothed Mountain Mint

Pycnanthemum muticum

Family: Lamiaceae (lay-mee-AY-see-ee) (Info)
Genus: Pycnanthemum (pik-NAN-thee-mum) (Info)
Species: muticum (mu-tee-kum) (Info)
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Foliage Color:


Bloom Characteristics:

Flowers are fragrant

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Grow outdoors year-round


24-36 in. (60-90 cm)


12-15 in. (30-38 cm)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Sun to Partial Shade



Bloom Color:

White/Near White

Bloom Time:

Mid Summer

Late Summer/Early Fall


Grown for foliage



Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

By dividing the rootball

From semi-hardwood cuttings

By simple layering

Seed Collecting:

Unknown - Tell us


This plant has been said to grow in the following regions:

Decatur, Georgia

Frenchtown, New Jersey

Pound Ridge, New York

Raleigh, North Carolina

Cincinnati, Ohio

Greensburg, Pennsylvania

Unionville, Pennsylvania

Wilkes Barre, Pennsylvania

Colonial Beach, Virginia

Haymarket, Virginia

Leesburg, Virginia

South Boston, Virginia

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Gardeners' Notes:


On Jan 6, 2016, coriaceous from ROSLINDALE, MA wrote:

It's the showy silvery bracts around the flower heads that give this perennial its distinctive color. They remain showy for months on end. The leaves are green.

Very attractive to a wide range of pollinators and beneficial insects. The lovely minty fragrance is only noticeable if the foliage is stroked or rubbed.

Spreads by underground rhizomes.

Highly adaptable, full sun to medium shade. Though the deceptive common name suggests a plant from the mountains, this is a plant of low-elevation meadows and woodland edges. Its native range runs from NH to TX.

June 2016: The rhizomes have spread about 18" in one season. If planting, I'd space these at least 3' apart, to allow full coverage in the second season. I would only plant this in... read more


On Jul 30, 2015, Rickwebb from Downingtown, PA wrote:

It is a lovely meadow or prairie plant of eastern North America that grows well in gardens. It is a fantastic pollinator plant for bees, butterflies, etc. Sold by a good number of native plant nurseries as North Creek Nursery in southeast PA. Easy to grow and low maintenance.


On Jun 23, 2013, leite14 from Fairfax, VA wrote:

I first saw these plants in North Carolina at the Cherokee Museums native plant-pollinators' garden. It was filled with lovely specimens. This plant was the pollinators favorite. It was a bouquet of butterflies, honey bees, native bees, and others. As soon as we got home, I started looking for this plant. I lucked out and found a few locally. These are hard to find! Over two years I collected enough to make a decent sized patch. I tried it in a dry part of my yard. It survived but was not happy. I moved it to a place where we regularly dump our chickens' water. It has flourished there and in other places with moderate moisture. It is a slow spreader, not at all invasive like spearmint or peppermint. I wish it would spread faster! Im a beekeeper/ butterfly gardener and we have a large co... read more