Generally — Most Areas
mountain mint (zones 3-7) suits most of District of Columbia (7b-8a) — zone 7 are in range, and the rest of the state is the exception.
Mountain Mint in District of Columbia — the short answer
Mountain Mint in District of Columbia: hardy in zones 3–7, full sun.
- Plant zones
- 3-7
- NC State Extension Gardener Plant Toolbox
- District of Columbia zones
- 7b-8a
- USDA PHZM 2023
- Frost window
- Mar 15 – Nov 24
- NOAA RCC ACIS 1991-2020, 28°F
- Typical season
- ~254 days
- NOAA Regional Climate Centers ACIS, 1991-2020
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — per-field provenance varies and is published with the dataset.
Your yard isn't the whole zone.
District of Columbia spans zones 7b-8a, but your yard sits in exactly one — and slope, tree cover, and cold-air pockets nudge it further. Enter your address and we'll score mountain mint against your parcel's actual hardiness, soil, and sun.
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Where Mountain Mint Stands in District of Columbia
Mountain Mint is rated for zones 3–7 — a cold floor USDA puts at -40 to -30°F. No District of Columbia county sits inside it, so in open ground this is a grown-under-cover plant here rather than a bed plant — which is a statement about District of Columbia winters, not about mountain mint.
Above the zone 7 ceiling
1 county
- District of Columbia County · zone 8a
Warmer than the zone 7 end of its range.
County hardiness zones: USDA Plant Hardiness Zone Map (PHZM) 2023, per county. A zone is a 10°F band of average annual extreme minimum temperature, so the floor above is the band the plant's rating denotes, not a single measured kill point. Slope, shelter and cold-air drainage routinely move a site half a zone either way from its county figure — which is the part only your address resolves.
Zone Comparison
Mountain Mint Needs
- USDA Zones: 3-7
- Sun: Full SunWe haven't confirmed this against a published source yet.
- Mature size: 3 ft tallWe haven't confirmed this against a published source yet.
- Picking window: ~45 days of harvestWe haven't confirmed this against a published source yet.
- Drought tolerance: MediumWe haven't confirmed this against a published source yet.
District of Columbia Has
- USDA Zones: 7b-8a
- Last Hard Freeze (28°F): Mar 15
- First Hard Freeze (28°F): Nov 24
- Annual Rainfall: 39-43 inches
- Common Soils: Urban fill, Silt loam, Clay loam
Plant Zone Range (zones 3-7)
Preferred Soil pH
We haven't confirmed this against a published source yet.
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS, and university Extension sources — per-field provenance varies and is published with the dataset. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Mountain Mint in District of Columbia
The frost window
Across District of Columbia, the last spring hard freeze (28°F) clears between Mar 15 and Mar 15, and the first fall hard freeze lands between Nov 24 and Nov 24 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 254-day window you can count on — up to 254 days on a mild site in a kind year. That marks the hard freeze, not the last light frost, so tender transplants usually wait another 2-3 weeks.
Winter standing
District of Columbia runs as cold as USDA zone 7, and no sourced winter-hardiness floor is on record for mountain mint, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether mountain mint is a permanent planting or a replant-every-spring crop for you turns on your own zone within District of Columbia; check its hardiness range against that before treating it as long-lived ground.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: Growable Ground Plant Database — frost-free days from FAO ECOCROP, days to harvest from university Extension production guides, and growing-degree-day and chill-hour minimums that are compilation estimates rather than published figures. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Soil + Drainage Fit
Mountain Mint likes near-neutral soil (pH 5.5-7.5). That's the common-ground band across District of Columbia's urban fill and silt loam — a soil test confirms it for your site. It will grow across that whole span, but it does best between pH 6 and 7 — worth knowing before you decide whether a District of Columbia soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your District of Columbia site is heavier clay or sits in a low spot, a raised bed lifts the roots above wet ground, or work in compost. pH range, preferred pH and drainage need: We haven't confirmed this against a published source yet.
Plant pH requirements: FAO ECOCROP and USDA PLANTS, with the remaining rows from other published sources or Growable Ground compilation. Drainage: FAO ECOCROP, with the remaining rows from other published sources or Growable Ground compilation. District of Columbia soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
What Else to Consider for Mountain Mint in District of Columbia
Zone compatibility tells you about winter cold survival — but District of Columbia growers also need to think about:
Dense urban siting means small lots, compacted fill soils, and limited sun
Summer heat and humidity promote fungal diseases
The urban heat-island effect pushes summer temperatures above surrounding suburbs
What to actually do about these — and the constraints that apply to every District of Columbia grower, not just mountain mint — is covered on the District of Columbia growing guide.
Pollinator + Wildlife Value
Mountain Mint draws honeybees, native bees, butterflies, and moths (high value). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, mountain mint can only work that bloom inside District of Columbia's frost window — roughly 254 days, opening after the last 28°F freeze (Mar 15) and closing at the first (Nov 24), per NOAA Regional Climate Centers ACIS, 1991-2020. Pollinator value: We haven't confirmed this against a published source yet.
District of Columbia Cooperative Extension
For District of Columbia-specific cultivar recommendations, planting calendars, and pest pressure for mountain mint, the canonical source is UDC Center for Urban Agriculture. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Mountain Mint native to District of Columbia?
Mountain Mint is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-10-19) does not record it growing in District of Columbia. It can still earn a place in a District of Columbia garden — the zone comparison above tells you whether it will thrive.
Looking for plants that belong here? The District of Columbia growing guide lists plants that USDA PLANTS records growing in District of Columbia and that Kew and NatureServe Explorer both list in its native range, leaving out any that NatureServe flags as exotic there or that our audit holds.
State records: USDA PLANTS Database state-distribution data (presence, not state-level nativity), accessed 2026-10-19.
Common Questions About Growing Mountain Mint in District of Columbia
When can I plant Mountain Mint in District of Columbia?
District of Columbia's last spring hard freeze (28°F) clears between Mar 15 and Mar 15, and the first fall hard freeze lands between Nov 24 and Nov 24 (NOAA Regional Climate Centers ACIS, 1991-2020). No sourced winter-hardiness floor is on record for Mountain Mint, so this page does not state whether it overwinters in District of Columbia and publishes no fall establishment date for it — check its hardiness range against your own zone before treating it as a permanent planting.
What hardiness zone is Mountain Mint grown in across District of Columbia?
District of Columbia spans USDA hardiness zones 7b-8a (USDA ARS PHZM 2023). Mountain Mint carries a range of zones 3-7, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical District of Columbia site have?
A typical District of Columbia site sees ~254 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Mountain Mint should be matched against that window, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Mountain Mint native to District of Columbia?
Mountain Mint is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-10-19) does not record it growing in District of Columbia. It can still earn a place in a District of Columbia garden — the zone comparison above tells you whether it will thrive.
How should I amend the soil for Mountain Mint in District of Columbia?
Mountain Mint prefers pH 5.5-7.5 and well (dry spells) drainage. We haven't confirmed this against a published source yet. That sits in the common-ground band across District of Columbia soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Mountain Mint actually grow on my specific land in District of Columbia?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores mountain mint against your address's mapped soil pH, drainage, sun, and frost-date data drawn from USDA SSURGO, NOAA, and PRISM — not state averages.
Check your specific parcel in District of Columbia
State-level data is a sketch. Your Growable Ground report scores mountain mint against your land's mapped soil, modelled sun, drainage, and frost data — not zone averages.
Three things about your lot that District of Columbia mountain mint averages can't show:
We read public map data around District of Columbia — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the District of Columbia mountain mint average
Explore More
Growing guides for mountain mint
Explore District of Columbia county by county
District of Columbia carries 1 counties with their own USDA zone — a sample of the growing pages for mountain mint there:
Where else mountain mint grows
Mountain Mint's zone band crosses state lines — these are the states closest to District of Columbia in winter climate where it also has a page, plus the far ends of its range. Each one re-answers the question with that state's own record.
More to grow in District of Columbia
District of Columbia has a growing page for 1,010 plants — a rotating sample of the rest of the shelf.
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