perennial · design plant record

Pycnanthemum muticum

Clustered mountain mint

Silvery flowering bracts repeat through a moist summer border.

Illustrations show a representative form; the detail view is a crop of the same artwork. Use the named factual source and exact cultivar for identification and purchase checks.

Height at maturity

0.91–1.22 m (3–4 ft)

Spread at maturity

0.61–0.91 m (2–3 ft)

Light

Sun / Part shade

Moisture

Moist, draining soil

Source-reported USDA zones

4–8 · verify subzone and cultivar

Principal seasonal role

Summer

Fit it to the site

Moist, draining soil with a sun or part-shade position.

A colony-forming plant rather than a fixed small clump.

Keep the care in the decision

Review its spreading edge annually and divide where needed.

Origin & safety checks

Eastern Central & Eastern U.S.A. Confirm local native range and restrictions.

Not a toxicity assessment. Verify the exact plant and any edible part with an appropriate local authority; keep uncertain plants away from ingestion.

Check current invasive restrictions with your local plant-health or extension authority. For pets, use the exact botanical name in a veterinary toxicity reference; for potential ingestion or exposure, get appropriate professional advice rather than relying on a design guide.