Pycnanthemum muticum: Clustered Mountain Mint

Latin name:  Pycnanthemum muticum
Common name: Clustered Mountain Mint
Flowers: Greenish-white with gray bracts mid to Late summer 4, 1/2" wide 12
Fruit or cones: Inconspicuous nut 4
Height & Width:18-36 in 4
Type: Herbaceous perennial 12
Habit: Spreading clump 12
Wetland indicator category**: 17

Atlantic and Gulf Coastal Plain


Eastern Mountains and Piedmont


Great Plains




Northcentral & Northeast


Texture:  Medium 12
Growth rate:  Fast 12
Light:  Full sun to part shade 12
Moisture:  Average- moist 4
Soil*: Clay-sandy loam, neutral/slightly acidic PH 12
Zones:  USDA Zones 4-8 12
Origin:  Native L48 16
Ecosystem benefits: Food, nectar and pollen, larval food source12

pycnanthemum muticum also known as Clustered Mountain Mint

Features:  Smells like peppermint 4. The plant grows quickly and can grow in shallow soil with bright- partial sun depending on flower preference. Rabbits and deer avoid this plant because of the strong scent. Since this is an herb, it can be used in tea. Blooms 4-6 weeks with full sun 12.

Siting:  Naturally found in sunny openings where the forest has been cleared or soil is shallow 12. Pycnanthemum muticum can grow in part shade, but it does not flower as well as full sun 12. Can be made to look like a bush for yards 12.

Care: Plant crown at soil level 18. At planting, water the roots and surrounding area slowly and deeply. Keep soil moist until plant is established, then apply enough water to thoroughly moisten the root zone when the soil is dry or during drought. Modify water recommendations to reflect site drainage and rainfall. Apply 3” of mulch over the planted area. Do not allow mulch to touch the plant stems 18.

Pests: Plants are relatively pest resistant if cultural preferences are met 12.

This plant does not appear on the following invasive plant lists on (9/24/2022):

Author: Chloe Aiello

Image source: NC State. “Pycnanthemum Muticum.” Pycnanthemum (Mountain Mint) | North Carolina Extension Gardener Plant Toolbox, 2022,


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*Soil pH is determined using a professional soil test. Contact your Clemson University County Extension service for assistance Click on “local offices”.

**2012 Plant Wetland Indicator categories (quantitative derived)


Indicator Code

Indicator Status



Obligate Wetland

Almost always is a hydrophyte, rarely in uplands


Facultative Wetland

Usually is a hydrophyte but occasionally found in uplands



Commonly occurs as either a hydrophyte or non-hydrophyte


Facultative Upland

Occasionally is a hydrophyte but usually occurs in uplands


Obligate Upland

Rarely is a hydrophyte, almost always in uplands