Slender Mountain Mint

Pycnanthemum tenuifolium
Slender Mountain Mint (Pycnanthemum tenuifolium)
Slender Mountain Mint (Pycnanthemum tenuifolium)
Plant TypeFlowering Perennials
Sun ExposureFull Sun (6+ Hrs)
HeightShort (1-3')
MoistureDry, Medium
Bloom MonthsMay, June, July
Moisture NeedsNormal
Season of InterestSummer (Jun-Aug)
Ecological SignificanceNative Bee Friendly, Butterfly Friendly, Bird Friendly, Hummingbird Friendly

Description

Slender Mountain Mint is a graceful and aromatic native perennial known for its fine, needle-like foliage and profuse clusters of tiny white to pale lavender flowers. Blooming from mid to late summer, its airy texture and silvery-green color bring a light, delicate touch to prairies, meadows, and garden borders. The fragrant leaves release a refreshing minty scent when brushed, and the abundant blooms draw in clouds of pollinators. With its upright habit and soft appearance, Slender Mountain Mint provides structure, fragrance, and ecological energy to sunny native plantings.

Ecological Value

Pycnanthemum tenuifolium is one of the top pollinator-supporting native plants, offering nectar and pollen to a remarkable diversity of bees, butterflies, wasps, and flies. It supports both generalist and specialist native bees, including sweat, leafcutter, and bumble bees. Butterflies, skippers, and beneficial predatory insects also visit its long-lasting blooms. The aromatic foliage is resistant to deer and rabbits, while its dense stems provide foraging and resting sites for beneficial insects. Its prolonged bloom period and high nectar production make it an invaluable resource for sustaining pollinators through the heart of summer.

Ideal Growing Conditions

Slender Mountain Mint thrives in full sun and dry to medium, well-drained soils, naturally occurring in prairies, open woods, and dry meadows. It prefers loamy or sandy soils but tolerates clay and occasional drought once established. It spreads slowly by rhizomes, forming neat colonies that are easily managed and non-aggressive. Its resilience to heat, poor soils, and dry conditions makes it ideal for low-maintenance landscapes and ecological restorations alike.

Landscape Uses

Ideal for pollinator gardens, prairies, meadows, and naturalized borders, Slender Mountain Mint adds fragrance, texture, and ecological vitality to sunny plantings. It pairs beautifully with Butterfly Weed, Purple Prairie Clover, and Stiff Goldenrod for a vibrant, wildlife-rich design. Its soft, fine foliage complements bolder plants and creates visual balance in mixed compositions. Hardy, adaptable, and exceptionally beneficial to pollinators, Slender Mountain Mint is a cornerstone species for gardeners seeking to combine beauty, resilience, and ecological impact in one elegant native perennial.

Slender Mountain Mint Native Range

Map Color Key

Species present in state and nativeSpecies present and not rare
Species not present in stateSpecies present and rare

Kartesz, J.T., The Biota of North America Program (BONAP). 2015. North American Plant Atlas. (http://bonap.net/napa). Chapel Hill, N.C. [maps generated from Kartesz, J.T. 2015. Floristic Synthesis of North America, Version 1.0. Biota of North America Program (BONAP). (in press)].

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