Clyde Park, Montana, sits in USDA hardiness zone 4b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Growers here do well with cabbage, cranberry, cilantro, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Clyde Park, 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 Clyde Park lot. Enter your address and we'll score 1,086 plants against your land's actual soil, sun, and frost.
We read public map data around Clyde Park — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Clyde Park — the short answer
Clyde Park, Montana: USDA zone 4b, about 141 days between hard freezes, across 239 acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Sep 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~141
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 239 acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 4b is Clyde Park's average, not your lot's — a low corner or a tree line moves it. Against Clyde Park's 141-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Clyde Park
Each reading below is measured for Clyde Park itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredClyde Park runs about 141 days between hard freezes — a short growing season.
Long-maturing crops like melons, sweet potatoes, and winter squash can run out of runway before the first hard freeze, ripening late or not at all.
Lead with fast-maturing varieties, and stretch the season on both ends with cold frames, low tunnels, or a greenhouse.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredClyde Park sits in USDA hardiness zone 4b.
The zone sets which perennials, shrubs, and fruit trees live through an average winter here — a plant rated for a colder zone is a safe bet, one rated warmer needs winter protection or gets treated as an annual.
Match perennials and fruit to the zone before you buy, so nothing you plant is a gamble against the cold.
USDA PHZM 2023
The kind of country Clyde Park is in
Clyde Park sits in the Northwestern Great Plains — EPA Level III, inside the wider Great Plains. That is read at Clyde Park's own centroid, and it is not what its county reads: Park County is mostly Middle Rockies. The wider page above you is answering a different question about different ground.
What Grows in Clyde Park
Every plant below cleared Clyde Park's own zone 4b and its 141-day season. Each card opens that plant's Montana profile. How we score.
Is it too late to plant in Clyde Park?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Apr 13; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 11 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 29 — long-season crops need about 90 days of runway, quick greens only 30. When the window is tight, the fall moves are quick ones — baby greens, radishes, and garlic set for next season.
What's on the federal record near Clyde Park
Closest first, within ~10 miles of Clyde Park. Listing isn't leaking, and distance isn't exposure.
- KEY PUMPUnderground Storage Tanks · 450 ft
- HOFFMANS MACHINE WELDING & REPAIRUnderground Storage Tanks · 450 ft
- BOB R TANNERUnderground Storage Tanks · 500 ft
- DALES FUEL INCUnderground Storage Tanks · 650 ft
- SHIELDS VALLEY HIGH SCHOOLUnderground Storage Tanks · 2000 ft
- MDOT WILSALL SITEUnderground Storage Tanks · 4.0 mi
- CRAZY MOUNTAIN RANCH INCUnderground Storage Tanks · 6.9 mi
- CRAZY MOUNTAIN RANCH WASTEWATER FACILITYBrownfields · 7.8 mi
- PARK FARMERS COOPUnderground Storage Tanks · 7.9 mi
- LAUREL MANTZUnderground Storage Tanks · 8.0 mi
- PULIS RANCHUnderground Storage Tanks · 8.3 mi
- IBEX RANCH COUnderground Storage Tanks · 8.3 mi
1 more site is on the record inside the same radius. See them on the map
Measured from Clyde Park's center, not your beds. Run your own address for what's upwind of you specifically.
Environmental Intelligence
The counts behind that headline — every source type on the record near Clyde Park.
Severity Distribution
within ~10 miles of Clyde Park
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
Check your specific parcel in Clyde Park
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,086 plant recommendations.
25+ data sources read at your address, not the Clyde Park average
Your land is one point inside Clyde Park
Everything above resolves to Clyde Park as a whole — one PHZM band and one 28°F frost record, read across 239 acres. Your parcel is one point inside that footprint. Slope, tree cover, a low spot that pools cold air, and what is in the soil are all resolved at the address, and none of them are visible at town scale. That is the honest boundary of this page, and the reason the next step is a reading of your own ground rather than a better local average.
Your Lot vs the Clyde Park Average
Clyde Park Average
- ●USDA Zones 4b, averaged across Clyde Park
- ●One soil character for all of Clyde Park
- ●Frost dates read at Clyde Park's scale: May 11 to Sep 29
YOUR Parcel
- ✓Your exact zone, not Clyde Park's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Clyde Park
Pull a site-specific report for your exact address in Clyde Park, Montana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Clyde Park averages can't show:
We read public map data around Clyde Park — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Clyde Park average
How we know this about Clyde Park
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Clyde Park’s own record; boundaries and acreage from US Census TIGER/Line 2025; the contamination records from the federal sources named in their beats above. Soil is not read at town grain anywhere on this page — there is no town-resolution survey in our data, which is why you will find no soil grid here rather than a statewide one wearing a local label. The resolution ledger below names every figure this page inherited.
Common questions about Clyde Park
When does frost risk typically end in Clyde Park?
The last hard freeze (28°F) in Clyde Park typically lands around May 11, per NOAA 1991–2020 climate normals — earlier than the light-frost dates most charts quote. That marks the hard freeze, not the last light frost — lighter frosts keep biting past it, which is why tender transplants here wait until about Jun 1.
When is the first frost in Clyde Park?
The first hard freeze (28°F) in Clyde Park typically arrives around Sep 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 15, so the watching starts about Aug 30 — about 141 days after the spring freeze cleared.
How long is the growing season in Clyde Park?
Measured between 28°F hard freezes, Clyde Park sees about 141 frost-free days — roughly May 11 through Sep 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 1 to Sep 15, about 106 days.
Is the soil safe to grow vegetables in Clyde Park?
The federal record around Clyde Park is light — 13 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (12), the nearest Underground Storage Tanks record under a tenth of a mile out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do gardeners stretch the season in Clyde Park?
With about 141 frost-free days between hard freezes, Clyde Park rewards the classic extension moves: floating row cover buys roughly two to four extra weeks at each shoulder — on this season that is a working window nearer 169 to 197 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 11 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Clyde Park's scale — its 4b band and its 141-day season. Your yard writes its own version of Clyde Park's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
What this page reads at Clyde Park’s own scale
6 of the readings below were taken at Clyde Park's own scale — its own ~141-day season between 28°F freezes, the 239 acres it covers and 13 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Clyde Park's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Clyde Park's own 28°F hard-freeze dates, about May 11 and Sep 29 and the ~141-day span between themNOAA 1991–2020 Climate Normals
- 13 documented contamination sites on the federal record near Clyde Park, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Clyde Park's boundary and the 239 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~141-day seasonGrowable Ground crop-matching engine
- Clyde Park sits in the Northwestern Great Plains — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Clyde Park's 239 acres read through its county's SSURGO summaryfrom Park County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Park County
- The growing challenges every Montana grower plans around — written at state scale, so they stay on the state guidefrom Montana
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Park County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Clyde Park's 239 acreswhy one lot differs from the next →
- Which side of Clyde Park you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 239 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile out, measured from the town centrehow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — measured at your address, and averaged away by any Clyde Park-wide figureread your own land →
More in Montana
Growing region
Nearby growing guides