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Pycnanthemum tenuifolium (slender mountain mint)
Seen at Brookside Gardens, VA
Species Distribution Map
Map Color Key © 2013 BONAP

Pycnanthemum tenuifolium

slender mountain mint

Densely branching with fine foliage and white flowers atop terminal clusters, this Pycnanthemum tenuifolium, or slender mountain mint, has a more delicate appearance than P. muticum but with all the same pollinator action. Like its mountain mint brethren, P. tenuifolium spreads generously by rhizome making this plant a wonderful mass of white blooms in late summer. 

SIZE
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Height

20-30 in

Spread

12-24 in

Spacing

12-18 in

Bloom Color

White

USDA Hardiness Zone 4-8

slender mountain mint Interesting Notes

Pycnanthemum tenuifolium is a narrow-leaved species of mountain mint with an upright habit reaching up to 3' tall and growing about 2' wide. Blooms are small, white clusters and while attractive, what really is noticeable is how much this plant attracts animals of all kinds! A favorite for native bee species, it is swarming with insects as it blooms in June through August. Slender mountain mint has a much more fine texture than Pycnanthemum muticum which allows a nice play of textures in the garden. Like other Pycnanthemum, this plant has a minty aroma when the leaves are crushed. 


Growing well in medium-wet to medium-dry soils in full sun to part sun, Pycnanthemum tenuifolium is adaptable, hardy, and an interesting plant in the border, meadow, herb garden, or naturalized areas such as areas near streams. 

Key Characteristics & Attributes

Butterflies
Butterflies
Full Sun
Full Sun
Part Sun
Part Sun
Summer
Summer
Moist
Moist
Average
Average
Fragrant
Fragrant

Additional Information

Season of Interest (Flowering)
Late Summer
Propagation Type
Open pollinated
Attributes
Meadow
Moist Sun
Native to North America