Alphabetical Plant Listing

Pycnanthemum incanum (Silverleaf Mountain Mint)

Mountain Mint, Hoary Mountain Mint, Silverleaf Mountain Mint


Prized for its silvery foliage, Pycnanthemum incanum (Silverleaf Mountain Mint) is a stiff, erect, clump-forming, aromatic perennial adorned with opposite, ovate, toothed leaves to 3 in. long (7 cm). The leaves are hoary beneath and borne on sturdy square stems. In mid to late summer, dense rounded clusters of tiny, silvery-white, two-lipped flowers appear atop the stems. They bloom for about 6 weeks and continue into early fall. The blossoms are often spotted with purple. The silvery coloring extends to the stems and leaves subtending the flower clusters. All parts of the plant exude a pleasant minty fragrance when crushed. The flowers are a favorite of butterflies, moths and beneficial pollinators. The leaves have been used to flavor teas. Pycnanthemum incanum is a good choice for meadows, wildlife gardens, woodland edges where it can roam freely. Great for water-wise landscapes or for erosion control.

  • Grows up to 2-3 ft. tall (60-90 cm) and 3-4 ft. wide (90-120 cm). Can spread aggressively (by creeping rhizomes) but is easily controlled by division every 3-5 years.
  • Thrives in full sun to part shade in average, dry to medium, well-drained soils. Best flower production is obtained in full sun. Drought and dry soil tolerant.
  • Best for prairies and meadows, native plant gardens and naturalized areas.
  • No serious pest or disease issues.
  • Propagate by cuttings in early summer or division in late fall or early spring.
  • Native to the eastern United States.

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Requirements

Hardiness 4 – 8
Plant Type Perennials
Exposure Full Sun, Partial Sun
Season of Interest Summer (Mid,Late)
Fall
Height 2' – 3' (60cm – 90cm)
Spread 3' – 4' (90cm – 120cm)
Spacing 48" (120cm)
Water Needs Low, Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Showy
Native Plants United States, Midwest, Illinois, Indiana, Michigan, Ohio, Northeast, Connecticut, Delaware, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Southeast, Alabama, Florida, Georgia, Kentucky, North Carolina, South Carolina, Tennessee, Virginia, West Virginia
Tolerance Drought, Dry Soil
Attracts Butterflies
Garden Styles Informal and Cottage, Prairie and Meadow

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Doug McGrady, Flickr

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 4 – 8
Plant Type Perennials
Exposure Full Sun, Partial Sun
Season of Interest Summer (Mid,Late)
Fall
Height 2' – 3' (60cm – 90cm)
Spread 3' – 4' (90cm – 120cm)
Spacing 48" (120cm)
Water Needs Low, Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Showy
Native Plants United States, Midwest, Illinois, Indiana, Michigan, Ohio, Northeast, Connecticut, Delaware, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Southeast, Alabama, Florida, Georgia, Kentucky, North Carolina, South Carolina, Tennessee, Virginia, West Virginia
Tolerance Drought, Dry Soil
Attracts Butterflies
Garden Styles Informal and Cottage, Prairie and Meadow

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