What Grows in King Ranch Colony, Montana

USDA Zones 3a-4b · 710 acres

King Ranch Colony, Montana, sits in USDA hardiness zones 3a-4b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.

These conditions suit cherry, potato, lentil, and ponderosa pine — a starting list any specific site will trim or extend with its own soil, sun, and drainage.

Score your parcel · free

Even in King Ranch Colony, no two yards are alike.

A low spot, a south-facing slope, or a stand of trees moves the frost date and sun across a single King Ranch Colony lot. Enter your address and we'll score 1,112 plants against your land's actual soil, sun, and frost.

We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.

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Quick Facts

USDA Zones

3a-4b

Last Hard Freeze (28°F)

May 2

Town normal — light frosts run a few weeks later

First Hard Freeze (28°F)

Oct 13

Town normal — light frosts arrive a few weeks earlier

Town Area

710 acres

Hardiness Zone Range

3a
4b
3a (Cold)13b (Hot)

Zone maps are averages across King Ranch Colony. Your yard's slope, trees, and frost pockets shift what actually grows — see your land's exact reading.

Soil varies lot by lot — soil types explained.

Is it too late to plant in King Ranch Colony?

Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Apr 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 2 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 13 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.

Growing Challenges in Montana

What an experienced grower plans around here — each one has a move.

Very short growing season (60-100 frost-free days)

At 60-100 frost-free days, a high tunnel or cold frame isn't a luxury — it's the difference-maker Montana growers rely on.

Low rainfall requires irrigation in most areas

Drip irrigation plus mulch stretches scarce water a long way — plan the system before the first seed.

Extreme winter cold (-40F possible)

Choose perennials rated for the cold you actually get — a -40°F winter audits every optimistic zone push.

For cultivar selection, pest pressure, and planting-time guidance specific to Montana, the Montana State University Extension is the authoritative local source.

Environmental Intelligence

Understanding what's nearby helps you make informed decisions about where and how to grow.

Total Sites

193

within ~10 miles of King Ranch Colony

Risk Level

Elevated

Highest-severity

1 Superfund site

Severity Distribution

within ~10 miles of King Ranch Colony

High4Moderate125Low64

Highest-Severity Sites

Cable
Mining Sites · Occurrence
Lead Chief and Lead Chief No. 2
Mining Sites · Past Producer
Lewistown Aaf
Superfund · Superfund (Non-NPL)
Republic Mine
Mining Sites · Past Producer
14n16e18abbc01
Nitrate Monitoring · Well

A note from Gnorman

What an experienced grower watches for around here

In and around King Ranch Colony, two things run higher than the national average — CAFO (4 sites) and Nitrate (106 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.

CAFO: CAFOs pose a different contamination profile than chemical sources.

Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.

Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.

Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).

Free Report

Check your specific parcel in King Ranch Colony

Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,112 plant recommendations.

Three things about your exact spot that zone averages miss:

Your soil pHYour frost-free daysYour sun & shade

We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.

25+ data sources analyzed in seconds

Your Specific Parcel Matters

King Ranch Colony Average

  • USDA Zones 3a-4b
  • Generic soil type for the area
  • State-average frost dates

YOUR Parcel

  • Your exact hardiness zone
  • Your SSURGO soil type & pH
  • Your sun exposure, cast in 3D

See MY Growing Report

Free Report

Read your specific parcel in King Ranch Colony

Pull a site-specific report for your exact address in King Ranch Colony, Montana — soil, sun, drainage, frost risk, and scored plant recommendations.

Three things about your exact spot that zone averages miss:

Your soil pHYour frost-free daysYour sun & shade

We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.

25+ data sources analyzed in seconds

Key Growing Facts for King Ranch Colony, Montana

  • USDA Hardiness Zones: 3a-4b (USDA PHZM 2023)
  • Last Hard Freeze (28°F): May 2 (town normal, NOAA 1991–2020 Climate Normals — light frosts can follow for a few weeks)
  • First Hard Freeze (28°F): Oct 13 (town normal, NOAA 1991–2020 Climate Normals — light frosts can arrive a few weeks earlier)
  • Days Between Hard Freezes: ~164 (town normal, NOAA 1991–2020 Climate Normals)
  • Land Area: 710 acres (US Census TIGER 2025)

Zone data: USDA ARS Plant Hardiness Zone Map 2023. Climate data: NOAA NCEI. Boundaries: US Census TIGER/Line 2025.

Frequently Asked Questions

What hardiness zone is King Ranch Colony, Montana?

King Ranch Colony sits in USDA hardiness zones 3a-4b, per the USDA Plant Hardiness Zone Map 2023. Zones reflect average annual extreme minimum temperatures from 1991–2020 weather data.

Is it too late to plant in King Ranch Colony?

Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Apr 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 2 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 13 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.

When does frost risk typically end in King Ranch Colony?

The last hard freeze (28°F) in King Ranch Colony typically lands around May 2, per NOAA 1991–2020 climate normals — an earlier marker than the light-frost dates many planting charts quote. That marks the hard freeze, not the last light frost — light frosts can still bite for a few more weeks, so tender transplants usually wait another 2–3 weeks.

When is the first frost in King Ranch Colony?

The first hard freeze (28°F) in King Ranch Colony typically arrives around Oct 13, per NOAA 1991–2020 climate normals — the point most tender summer crops finish. Lighter frosts usually reach a couple of weeks earlier, so watch the forecast from late summer on and harvest or cover tender plants before the first cold night.

What vegetables grow in King Ranch Colony?

King Ranch Colony's zones 3a-4b support a wide range — strong performers include Cherry, Potato, Lentil, Ponderosa Pine, and Rhubarb. What actually takes on any one site comes down to its soil, sun, and drainage, and we score each plant against the real conditions at your address.

Which hardiness zone is King Ranch Colony, really?

Officially, King Ranch Colony sits in USDA zones 3a-4b (USDA PHZM 2023) — but a zone is a 30-year average of winter's coldest night across an area, and it can't see any one yard. A south-facing slope, a tree line, or a low frost pocket can shift a single site by half a zone either way, which is why neighboring gardeners often quote different numbers. We read the conditions at your exact address — soil, sun, slope, and frost — and score 1,112 plants against what's actually there.

Is the soil safe to grow vegetables in King Ranch Colony?

The federal record around King Ranch Colony is a meaningful one — 193 documented sites — so a soil test before new food beds is a sensible precaution here, not a reason to hold back from growing. Remember that proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what sits where.

How do I protect my plants from frost in King Ranch Colony?

As the season closes around the first 28°F hard freeze near Oct 13 (NOAA 1991–2020 climate normals), a few moves buy time: cover tender plants with floating row cover or an old sheet on still, clear nights, water the soil the afternoon before a freeze so it holds warmth overnight, and harvest frost-tender crops like tomatoes, peppers, and basil before the first hard night. Hardy greens and root crops shrug off light frost and often sweeten after it, so leave them in.

Everything on this page is a King Ranch Colony average. Your yard writes its own version — we read soil, sun, drainage, and frost at your exact address. Try it for 14 days — no card required.