Growing Mountain Mint: A Complete Profile
By Growing Home Greens Team · August 10, 2026
Mountain mint is a native perennial mint relative with an unusually strong mint flavor and aroma for its size, and it draws pollinators reliably whenever it’s in bloom.
Starting from seed, not runners
Transplanting is recommended, starting seed indoors 6 to 8 weeks before transplanting out in mid-to-late spring. Sprinkle the seed on the soil surface and tamp it in lightly rather than burying it, since it needs light to germinate. Space plants 12 inches apart in rows 18 inches apart. It’s hardy in zones 5-8.
More controlled than a running mint
Like other mints, mountain mint can spread if left unchecked, but starting it from seed rather than the running rootstock some mint-family plants spread by gives more control over where it ends up in the garden, at least initially.
Harvest for tea and dried arrangements
Leaves can be harvested throughout the growing season. For the best dried material, gather flowering tops and leaves in late summer, useful for tea, scenting potpourri, or as a fragrant addition to dried flower arrangements.
Mountain mint has no well-established companion pairings, and nothing it needs to be kept away from. At 1 plant per square foot, it’s a good pollinator-support addition to the Garden Designer near flowering vegetables that benefit from extra pollinator traffic.
Source: Mountain Mint: Key Growing Information, Johnny’s Selected Seeds.
Companion planting guide for Mountain Mint · Find your planting dates
Typically viable in USDA zones 5-8. Not sure your zone? Look it up by ZIP code.
Mature height: 2-3 ft
Method: Start indoors: Start indoors from seed, then transplant outside. It needs a head start most zones can't give it by direct-sowing alone.
When to plant mountain mint, by zone
Every zone mountain mint grows in. Pick your zone in the header and it will be highlighted here. Each zone links to its full page.
| Zone | Start indoors | Sow or plant out | Harvest |
|---|---|---|---|
| 5a & 5b | Mar 22–Mar 29 | May 17–May 24 | Aug 15–Aug 22 |
| 6a & 6b | Mar 7–Mar 14 | May 2–May 9 | Jul 31–Aug 7 |
| 7a & 7b | Feb 20–Feb 27 | Apr 17–Apr 24 | Jul 16–Jul 23 |
| 8a & 8b | Feb 4–Feb 11 | Apr 1–Apr 8 | Jun 30–Jul 7 |
Harvest dates are about 90 days after the sow or plant-out date, not after starting seeds indoors.
See exact start-indoors, direct-sow, and harvest dates for your zone →
How many Mountain Mint plants fit per square foot?
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 2-3 ft.
Varieties worth considering
- Straight-species mountain mint (Pycnanthemum pilosum): Johnny's Selected Seeds sells this species plain, without competing named cultivars; the strong mint flavor and aroma are traits of the species itself. (source)
Why each variety is listed comes from the source shown next to it. We haven't grown these ourselves yet, so treat this as a research-backed starting point, not a personal endorsement. The buy links are separate from those sources: they go to seed suppliers that sell that exact variety, and we may earn a commission on some of them.
Where to buy mountain mint seeds
None of the seed suppliers we list carries mountain mint seeds right now. A local garden center or a specialty seed house is the place to look.
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See it growing
Search YouTube for "growing mountain mint" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
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Growing Mountain Mint: A native perennial mint relative with an unusually strong mint flavor and aroma for its size, popular with pollinators and useful in tea and dried arrangements.
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