Photo by Melody

PlantFiles: Hoary Mountainmint, White Horsemint, Hillside Mint
Pycnanthemum incanum

Family: Lamiaceae (lay-mee-AY-see-ee) (Info)
Genus: Pycnanthemum (pik-NAN-thee-mum) (Info)
Species: incanum (in-KAN-num) (Info)

Synonym:Pycnanthemum pycnanthemoides

2 vendors have this plant for sale.

6 members have or want this plant for trade.


4-6 ft. (1.2-1.8 m)

9-12 in. (22-30 cm)

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:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

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By sterhill
Thumbnail #1 of Pycnanthemum incanum by sterhill

By sterhill
Thumbnail #2 of Pycnanthemum incanum by sterhill

By ilima
Thumbnail #3 of Pycnanthemum incanum by ilima


1 positive
2 neutrals
No negatives

Gardeners' Notes:

Neutral berrygirl On Mar 7, 2007, berrygirl from Braselton, GA (Zone 7b) wrote:

Info from Underwood Gardens. Also known as Cherokee Sweet Mint. Makes a great honey plant, and a good food source for butterflies. Native Americans inhaled vapors from this before entering sweat lodges. Helps with lung problems. Plant is endangered.

Positive sterhill On Sep 26, 2006, sterhill from Atlanta, GA (Zone 7b) wrote:

Found growing in deep shade in the woods. The light touch of white on the leaves is very unusual and pretty.

Neutral mystic On Sep 1, 2001, mystic from Ewing, KY (Zone 6a) wrote:

This mint can get five foot tall. Really pretty in late summer, when the upper leaves turn white and has clusters of tiny lavender flowers.The leaves are highly scented with a combined scent of pennyroyal and lemon.


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

Atlanta, Georgia
Danville, Kentucky
Clyde, North Carolina
Wilkes Barre, Pennsylvania
Austin, Texas

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