Mountain Mint is a perennial grown for its white blooms, which open in summer and return year after year. It's hardy across USDA zones 3 through 7, shrugs off deer and grows just as well in a container as in the ground. Its summer flowers are a real draw for honeybees, native bees, butterflies, and moths.
Mountain Mint — the short answer
Mountain Mint: grown in zones 3–7, full sun, pH 5.5–7.5.
- USDA zones
- 3–7
- Manual horticultural correction (source not retained); NC State Extension and Missouri Botanical Garden, with the remaining rows from other published sources or Growable Ground compilation
- Soil pH
- 5.5–7.5
- Growable Ground Plant Database
- Sun
- Full Sun
- Growable Ground Plant Database
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — each tile names its own row's source, because per-field provenance varies.
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Zone averages can't see the slope, soil, frost, and sun that decide whether mountain mint actually takes — and those shift from one yard to the next. Enter your address and we'll score mountain mint against your land's real conditions.
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What Mountain Mint is
Mountain Mint grows as a perennial and reaches around three feet at maturity. It blooms white in summer. It's also deer-resistant and well suited to containers.
How to grow Mountain Mint
Mountain Mint grows in USDA zones 3 through 7. Mountain Mint does best in full sun — at least 6 hours of direct sun a day — and soil from pH 5.5 to 7.5, on well-drained ground.
USDA Zones
3-7
USDA PHZM 2023
Soil pH
5.5 - 7.5
Growable Ground Plant Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Mature Height
3 ft
Growable Ground plant catalog
Start the season right
Plant mountain mint in full sun with at least 6 hours of direct sun. It grows in the cool halves of the year, so sow it in spring or late summer rather than waiting for midsummer heat.
Match the soil
Mountain Mint prefers pH 5.5 to 7.5 (Growable Ground Plant Database). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.
Water steadily
Keep the root zone evenly moist through establishment. A 2–3 inch mulch layer holds moisture without waterlogging.
Harvest at its peak
Cut mountain mint blooms in the cool of the morning, just as they open, for the longest display.
Where Mountain Mint thrives
Mountain Mint is hardy across USDA zones 3 through 7. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.
A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 3–7 spans average winter lows from -40°F to 10°F (USDA PHZM 2023). Across the 50 states and DC, that band covers 23 outright and splits 25 more down the middle — and which side of that line your land sits on changes the answer.
Zones 3–7·Where Mountain Mint growsOpen map →
Where Mountain Mint stands, state by state
Mountain Mint is rated for zones 3–7 — a cold floor USDA puts at -40 to -30°F. Across the 50 states and DC, 23 sit fully inside that band, the line runs through 25 more, and 3 sit outside it — and inside every split state, the same line runs on at county grain.
Fully inside zones 3–7
23 states
3 of 23 shown
The line runs through
25 states
- Alaska · zones 1a-9a
- Idaho · zones 3b-8a
- California · zones 4b-11a
3 of 25 shown
Mountain Mint’s band covers part of each of these states — which side of the line your county sits on changes the answer, and each state page draws it.
State zone extents: USDA Plant Hardiness Zone Map (PHZM) 2023. A zone is a 10°F band of average annual extreme minimum temperature, so a state that splits the band contains the boundary — its own page draws the county line, and a parcel report resolves which side your land sits on.
What grows around Mountain Mint
Growing guides for mountain mint
In rotation planning, mountain mint counts as a Other — beds recover best when other crops don’t follow each other in the same spot year over year. (Growable Ground derivation — crop-rotation group from botanical family)
Related plants in perennial flower
Good to know
Good news for pet owners — mountain mint isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Mountain Mint is a standout pollinator plant — high value to bees and other pollinators. (Source: Xerces Society.)
Your land is one point inside Mountain Mint's range
This page resolves to the species. Your state page draws the county line, and a report reads the parcel — the soil pH, drainage, sun, and frost dates on your exact ground, which no species average can see.
See if Mountain Mint will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether mountain mint actually takes — we score it against the real conditions at your address.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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How we know this about Mountain Mint
The figures above are cited per row, not per site: the pH band names this plant’s own source column, the three temperature figures each carry their own, and days-to-maturity cites the publication that actually lists it. All of it comes from the Growable Ground Plant Database — a compilation over FAO ECOCROP, USDA PLANTS, and university Extension sources, published openly with per-field provenance.
Grounded inUSDA PLANTS Database•USDA PHZM•ASPCA
Frequently asked questions
Can I grow Mountain Mint in my zone?
Mountain Mint grows in USDA hardiness zones 3 through 7 (USDA PHZM 2023). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.
When should you plant Mountain Mint?
Mountain Mint is a cool-season crop, so it goes in during the cool halves of the year — early spring, and again in late summer for a fall planting — rather than at the height of summer heat. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Mountain Mint need?
Mountain Mint needs full sun — a spot that catches at least 6 hours of direct summer sun a day. In more shade it still grows, but usually gives a smaller, later crop. The catch is that a yard rarely gets even light everywhere — a fence, the house, or one tall tree can quietly take those hours. A Growable Ground report reads the real sun-hours across your land, canopy and buildings included, so you can pick the brightest bed before you plant.
What soil does Mountain Mint need?
Mountain Mint prefers soil pH 5.5 to 7.5, on well-drained ground (Growable Ground Plant Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Mountain Mint attract pollinators?
Yes — mountain mint's flowers are a strong nectar and pollen source for honeybees, native bees, butterflies, and moths. (Source: Xerces Society.)
Is Mountain Mint safe for pets?
Mountain Mint is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)