Add Slender Mountain Mint (Pycnanthemum tenuifolium) to your planting when you want a tough native perennial that stays airy, smells wonderfully minty when brushed, and draws a constant parade of beneficial insects. The narrow leaves create a fine texture that reads as light and wispy even when the plant is in full growth, and the late-season bloom is a welcome nectar stop in summer into early fall.

Give your plants full sun to part shade and average, well-drained soil. Once established, it handles dry-to-medium moisture well, but it also adapts to occasional wet spells as long as drainage is decent. Expect mature stems in the 24-36 inch range, with a similar spread, making it easy to tuck into borders, meadow-style plantings, and naturalistic beds without blocking shorter companions.

For best performance, plant where you can enjoy the fragrance and pollinator activity up close. Leave the spent flower heads for a little extra seasonal interest, or shear lightly after the main bloom to tidy the plant and encourage fresh growth. In rich soils, you may see more vigor; in leaner soils, it tends to stay more upright and refined.

Slender Mountain Mint can slowly expand over time. If you want to keep it contained, edge the clump in spring, divide every few years, or remove wandering shoots. Pair it with other sun-loving natives and perennials that appreciate similar conditions, and you will get a long-lasting, easy-care display with excellent garden value.

Specifications

• Cold hardiness zone: 4-8 (-30 degrees F) - Contact your local extension to confirm hardiness if you are in a fringe zone (we cannot guarantee hardiness in fringe zones)
• Light: Full sun   Part sun
• Mature height: 24-36"
• Spread: 24-36"

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