Plant Profile: Pycnanthemum

Taxonomy: Pycnanthemum

Names

Mountain Mint

  • Photo of Pycnanthemum (Pycnanthemums)

Phonetic Spelling:pik-NAN-thee-mum

Genus:Pycnanthemum

Species:

Family:Lamiaceae

Mountain Mints comprise a collection of plants belonging to the mint family, indigenous to North America, including all regions of North Carolina. When the leaves are crushed, they emit a robust minty aroma, making them suitable for culinary uses and tea preparation. These plants produce dense clusters of flowers that range from white to various shades of purple, attracting numerous pollinators from July to September. Even when not in bloom, their attractive foliage enhances any pollinator garden.

These plants thrive in well-drained soils that can range from moist to dry, preferring full sun to partial shade for optimal flowering. While they can spread through rhizomes, their growth can be easily managed if expansion is not desired. Mountain Mints are ideal for naturalized settings, native or pollinator gardens, and edible landscapes, with a wide variety of options available for selection.

Pycnanthemum Feature Summary

Pycnanthemum Image Gallery

Tags

#full sun tolerant
#fragrant flowers
#edible plant
#white flowers
#wildlife plant
#fragrant leaves
#native perennial
#nectar plant
#NC native
#summer flowers
#deer resistant
#lavender flowers
#pollinator plant
#native wildflower
#larval host plant
#NC Native Pollinator Plant
#butterfly friendly
#partial shade tolerant
#pollinator garden
#wavy-lined emerald butterfly

Similar Plants

Pycnanthemum Feature Summary

Attributes
Used medicinally by Native Americans
Eastern and central USA
This plant supports Wavy-lined Emerald (Synchlora aerata) larvae.
Leaves can be used in cooking and making teas.
Perennial
Fruit
Dry capsule that doesn't split open
Flowers
Tight clusters of tiny 2-lipped flowers surrounded by silvery bracts
Purple/Lavender
White
Fragrant
Showy
Long-lasting
< 1 inch
Leaves
Fragrant leaves vary in shape and size and usually have a whitish bloom.
Green
White
Velvety
Whole Plant Traits
Perennial
Native Plant
Wildflower
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Acid (<6.0)
Neutral (6.0-8.0)
Good Drainage
Moist
Occasionally Dry
Coastal
Mountains
Piedmont
4a
4b
5b
5a
6a
6b
7a
7b
8b
8a
3a
3b
9a
9b
Clay
Loam (Silt)
Sand
Landscape
Edible Garden
Butterfly Garden
Pollinator Garden
Garden for the Blind
Native Garden
Small groups
Naturalized Area
Butterflies
Pollinators

Pycnanthemum Attributes

Pycnanthemum: Uses (Ethnobotany)

Used medicinally by Native Americans

Pycnanthemum: Country Or Region Of Origin

Eastern and central USA

Pycnanthemum: Wildlife Value

This plant supports Wavy-lined Emerald (Synchlora aerata) larvae.

Pycnanthemum: Edibility

Leaves can be used in cooking and making teas.

Pycnanthemum: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Pycnanthemum Fruit

Pycnanthemum: Fruit Description

Dry capsule that doesn't split open

Pycnanthemum: Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Pycnanthemum Flowers

Pycnanthemum: Flower Description

Tight clusters of tiny 2-lipped flowers surrounded by silvery bracts

Pycnanthemum: Flower Color

filter_vintage
Purple/Lavender
filter_vintage
White

Pycnanthemum: Flower Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long Bloom Season
Long-lasting
Showy

Pycnanthemum: Flower Bloom Time

Winter
Spring
Summer
Fall

Pycnanthemum: Flower Petals

2-3 rays/petals
4-5 petals/rays
6 petals/rays
7 - 20 petals/rays
asymmetrical petals
Bracts
Colored Sepals
fused petals
more than 20 petals/rays
Tepals

Pycnanthemum: Flower Shape

Bell
Cross
Crown
Cup
Dome
Funnel
Irregular
Lipped
Radial
Saucer
Star
Trumpet
Tubular
Urn
Wheel

Pycnanthemum: Flower Size

1-3 inches
3-6 inches
< 1 inch
> 6 inches

Pycnanthemum Leaves

Pycnanthemum: Leaf Description

Fragrant leaves vary in shape and size and usually have a whitish bloom.

Pycnanthemum: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Pycnanthemum: Leaf Color

spa
Green
spa
White

Pycnanthemum: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Pycnanthemum: Hairs Present

No
Yes

Pycnanthemum: Leaf Feel

Fleshy
Glossy
Leathery
Papery
Prickly
Rough
Rubbery
Slippery
Smooth
Soft
Velvety
Waxy

Pycnanthemum: Leaf Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long-lasting
Showy

Pycnanthemum Whole Plant Traits

Pycnanthemum: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Pycnanthemum: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Pycnanthemum: Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Pycnanthemum: Growth Rate

Slow
Medium
Rapid

Pycnanthemum: Maintenance

Low
Medium
High

Pycnanthemum Cultural Conditions

Pycnanthemum: Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Pycnanthemum: Soil pH

Acid (<6.0)
Alkaline (>8.0)
Neutral (6.0-8.0)

Pycnanthemum: Soil Drainage

Frequent Standing Water
Good Drainage
Moist
Occasional Flooding
Occasionally Dry
Occasionally Wet
Very Dry

Pycnanthemum: NC Region

Coastal
Mountains
Piedmont

Pycnanthemum: USDA Plant Hardiness Zone

thermostat
3a
thermostat
3b
thermostat
4a
thermostat
4b
thermostat
5a
thermostat
5b
thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b
thermostat
9a
thermostat
9b

Pycnanthemum: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Pycnanthemum Stem

Pycnanthemum: Stem Is Aromatic

No
Yes

Pycnanthemum: Stem Cross Section

Angular
Oval
Round
Square

Pycnanthemum Landscape

Pycnanthemum: Landscape Theme

Asian Garden
Butterfly Garden
Children's Garden
Cottage Garden
Cutting Garden
Drought Tolerant Garden
Edible Garden
English Garden
Fairy Garden
Garden for the Blind
Native Garden
Nighttime Garden
Pollinator Garden
Rain Garden
Rock Garden
Shade Garden
Water Garden
Winter Garden

Pycnanthemum: Design Feature

Accent
Barrier
Border
Flowering Tree
Foundation Planting
Hedge
Mass Planting
Screen/Privacy
Security
Shade Tree
Small groups
Small Tree
Specimen
Street Tree
Understory Tree

Pycnanthemum: Resistance To Challenges

Black Walnut
Compaction
Deer
Diseases
Drought
Dry Soil
Erosion
Fire
Foot Traffic
Heat
Heavy Shade
Humidity
Insect Pests
Pollution
Poor Soil
Rabbits
Salt
Slugs
Squirrels
Storm damage
Urban Conditions
Voles
Wet Soil
Wind

Pycnanthemum: Landscape Location

Coastal
Container
Hanging Baskets
Houseplants
Lawn
Meadow
Naturalized Area
Near Septic
Patio
Pond
Pool/Hardscape
Recreational Play Area
Riparian
Rock Wall
Slope/Bank
Small Space
Vertical Spaces
Walkways
Woodland

Pycnanthemum: Attracts

Bats
Bees
Butterflies
Frogs
Hummingbirds
Moths
Pollinators
Predatory Insects
Reptiles
Small Mammals
Songbirds
Specialized Bees