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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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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


Unknown - Tell us

Bloom Color:

White/Near White

Bloom Time:

Mid Summer

Late Summer/Early Fall


Grown for foliage



Other details:

Average Water Needs; Water regularly; do not overwater

Flowers are fragrant

Soil pH requirements:

Unknown - Tell us

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:

Frenchtown, New Jersey

Pound Ridge, New York

Raleigh, North Carolina

Cincinnati, Ohio

Greensburg, Pennsylvania

Wilkes Barre, Pennsylvania

Colonial Beach, Virginia

Haymarket, Virginia

Leesburg, Virginia

South Boston, Virginia

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Gardeners' Notes:


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