Pycnanthemum muticum – Clustered Mountain Mint

General Information: A fantastic native pollinator, perhaps the most attractive to insects. Our plantings of this species are so well-liked by pollinator insects that an audible buzzing can be heard near the patch during peak bloom. On several occasions, we have counted more than 10 pollinator and beneficial insect species visiting these plantings! Stems are upright and branching. Leaves are larger and broader than those of other Pycnanthemum species. Don’t let the name “Mint” trouble you – while this plant forms dense colonies, they are easily managed, and uncontrollable spreading is not a problem with these eye-catching plants. The leaves of this species start out dark green, progressively becoming paler as the plant grows taller, with tiny hairs developing on leaves that emerge in summer.

Cultivation Details: The flower clusters are tightly compact, hence the common name, and have minute pinkish-white flowers. These flowers persist for a long time – from July until late September. Even after the flowers have passed, pollinators still visit the seed heads and are often seen attempting to pollinate them in vain long after the flowers have gone. Even after the first light frost when the hardiest insects are still scavenging for the last remaining flowers of the season, they can be seen visiting these plants. Dried seed heads in winter provide forage and nesting materials for birds and small mammals. Consider pairing with Solidago odora, Symphyotrichum species, Monarda species, Veronicastrum virginicum, and other native wildflowers.

Edible Qualities: Clustered Mountain Mint is useful as a spice. The leaves have a pleasantly strong minty aroma and flavor and are useful in any recipe that calls for Mint. All aerial parts of the plant, including the low growth found in winter and early spring, are edible. The plant also has a history of use in folk medicine as well as medicinal use amongst Indigenous Peoples.

Growing Requirements: Plant in full to part sun. Prefers moist, well-drained soils. Suitable for most soil conditions. Especially tolerant of sand, especially when there is some grass cover or mulch. Soil amendments are recommended for this plant to succeed in heavy clay soils. Suitable for mildly acidic, neutral, and mildly alkaline soils.