How to Grow Mountain Mint From Seed

Mountain mint is a hardy native perennial, and its seeds need a cold, moist chill before they will sprout. The simplest approach is to sow outdoors in late fall or winter, where winter weather does the chilling for you. To start indoors, give the seeds 30 to 60 days of cold-moist stratification in the fridge first, then surface-sow in early spring and grow them on. Either way, expect leaves the first year and the first flush of frosted blooms in the second summer.

Because the seeds need both a cold spell and light to germinate, sow them on the surface and do not bury them. For indoor starts, mix the tiny seeds with damp sand, seal them in a bag, and refrigerate for 30 to 60 days. Then scatter them thinly on top of moist seed-starting mix, press them in gently so they make good contact, and leave them uncovered. Keep the surface evenly moist at around 65 to 70F and in bright light. Germination is slow and uneven, often 14 to 35 days, so be patient. Move seedlings out after frost and space plants 18 to 24 inches apart in full sun to part shade.

Once established, mountain mint is tough and low-maintenance. Give it average, well-drained soil and medium moisture, watering during dry spells in its first season while the roots settle in. It rarely needs feeding, and it is seldom bothered by pests or deer thanks to its strong minty scent. The clump widens slowly by short rhizomes, so it stays tidy, but you can slice around the edges each spring if you want to keep it in bounds. Let it bloom and it will hum with pollinators from midsummer on. Virginia mountain mint is native across the eastern and midwestern United States and is very cold-hardy, roughly USDA zones 3 to 7, so it sails through hard winters in the Upper Midwest and Northeast; it handles the humid heat of the East and South well too, and because it spreads only by short runners rather than aggressive stolons, it behaves far better than true mint in a garden bed.

Mountain mint is one of the best pollinator plants you can grow, so pair it with other nectar-rich, garden-friendly plants to build a buzzing bed. These four make especially good neighbors, and you can add any of them in one click:

Harvest leaves and stems anytime once the plant is well established, but the flavor and aroma are strongest just before and during bloom in mid to late summer. Snip stems in the morning after the dew dries, taking no more than a third of the plant at once so it keeps growing. Use the leaves fresh, or hang small bundles upside down in a warm, airy spot to dry, then strip and store the leaves in a jar.

Mountain mint has a strong, cool, spearmint-like flavor, and the fresh or dried leaves brew into a bright, refreshing cup of tea. The leaves can also be used sparingly like other mints to flavor cold drinks, fruit, and desserts. In the garden its greatest gift is the pollinators: the frosted summer blooms draw an exceptional variety of native bees, honeybees, small wasps, butterflies, and other beneficial insects, making it a centerpiece of any native or wildlife planting.

• No germination: the seeds were probably sown too warm, buried, or skipped their chill. Cold-moist stratify for 30 to 60 days, surface-sow in light, and keep the mix evenly moist.
• Slow, uneven sprouting: this is normal for mountain mint. Stay patient over several weeks and keep the surface from drying out.
• Floppy, leggy stems: usually too much shade or overly rich soil. Grow it in full sun and lean, well-drained ground, and shear lightly in early summer for a bushier plant.
• Clump creeping wider: it spreads slowly by rhizomes, so slice around the edges with a spade each spring or plant it where it has room to fill in.