Wiggins, Colorado, sits in USDA hardiness zone 5a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Well-matched crops include cabbage, cranberry, lavender, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Wiggins, 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 Wiggins 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 Wiggins — soil, climate, flood, and parcel records. How we handle your address.
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Wiggins — the short answer
Wiggins, Colorado: USDA zone 5a, about 163 days between hard freezes, across 847 acres of town.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~163
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 847 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 5a is Wiggins's average, not your lot's — a low corner or a tree line moves it. Against Wiggins's 163-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Wiggins
Each reading below is measured for Wiggins itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWiggins runs about 163 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredWiggins sits in USDA hardiness zone 5a.
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 Wiggins is in
Wiggins sits in the High Plains — EPA Level III, inside the wider Great Plains. That is read at Wiggins's own centroid rather than borrowed from Morgan County.
What Grows in Wiggins
Every plant below cleared Wiggins's own zone 5a and its 163-day season. Each card opens that plant's Colorado profile. How we score.
Is it too late to plant in Wiggins?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Apr 2; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 30 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 10 — long-season crops need about 90 days of runway, quick greens only 30. As the window narrows, the plantings just get faster — fall brassicas, then greens, then garlic to finish.
What's on the federal record near Wiggins
Closest first, within ~10 miles of Wiggins. Listing isn't leaking, and distance isn't exposure.
- CDOT WigginsUnderground Storage Tanks · 950 ft
- Wiggins School District RE-50JUnderground Storage Tanks · 1000 ft
- CHS-M & M Co-Op Wiggins Station & BulkUnderground Storage Tanks · 1900 ft
- WIGGINS COOP INC. - WIGGINS PLANTBrownfields · 2300 ft
- Valley Feed & Seed IncUnderground Storage Tanks · 2400 ft
- FRONT RANGE FARMS, LLCCAFO · 1.1 mi
- Stubs Gas & Oil IncUnderground Storage Tanks · 1.4 mi
- Wiggins Junction LLCUnderground Storage Tanks · 1.7 mi
- PENSKE TRUCK LEASING CO LPBrownfields · 2.1 mi
- SB00306009BBB NAWQA 4Nitrate · 2.5 mi
- SIX ARROWS DAIRYCAFO · 2.9 mi
- JA TIMMERMAN WIGGINSCAFO · 3.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Wiggins'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 Wiggins.
Total Sites
48
within ~10 miles of Wiggins
Risk Level
Low
Highest-severity
2 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Wiggins
Severity Distribution
within ~10 miles of Wiggins
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Wiggins, two things run higher than the national average within ~10 miles of Wiggins — CAFO (6 sites) and Nitrate (16 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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).
Check your specific parcel in Wiggins
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 Wiggins average
Your land is one point inside Wiggins
Everything above resolves to Wiggins as a whole — one PHZM band and one 28°F frost record, read across 847 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 Wiggins Average
Wiggins Average
- ●USDA Zones 5a, averaged across Wiggins
- ●One soil character for all of Wiggins
- ●Frost dates read at Wiggins's scale: Apr 30 to Oct 10
YOUR Parcel
- ✓Your exact zone, not Wiggins's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Wiggins
Pull a site-specific report for your exact address in Wiggins, Colorado — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Wiggins averages can't show:
We read public map data around Wiggins — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Wiggins average
How we know this about Wiggins
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 Wiggins’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 Wiggins
When does frost risk typically end in Wiggins?
The last hard freeze (28°F) in Wiggins typically lands around Apr 30, 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 May 21.
When is the first frost in Wiggins?
The first hard freeze (28°F) in Wiggins typically arrives around Oct 10, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 26, so the watching starts about Sep 10 — about 163 days after the spring freeze cleared.
How long is the growing season in Wiggins?
Measured between 28°F hard freezes, Wiggins sees about 163 frost-free days — roughly Apr 30 through Oct 10, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 21 to Sep 26, about 128 days.
Is the soil safe to grow vegetables in Wiggins?
The federal record around Wiggins is light — 48 documented sites across the 9 federal source types we checked, mostly Nitrate entries (16), the nearest Underground Storage Tanks record about 0.2 miles 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 I protect my plants from frost in Wiggins?
From about Sep 10 the job here turns from planting to protecting — the last start even a 30-day crop can finish. As the season closes around the first 28°F hard freeze near Oct 10 (NOAA 1991–2020 climate normals), three moves buy time: row cover or an old sheet over tender plants on still, clear nights; water the soil the afternoon before a freeze, so it holds warmth overnight; and harvest tomatoes, peppers and basil before Oct 10. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Wiggins's scale — its 5a band and its 163-day season. Your yard writes its own version of Wiggins'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 Wiggins’s own scale
6 of the readings below were taken at Wiggins's own scale — its own ~163-day season between 28°F freezes, the 847 acres it covers and 48 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Wiggins's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Wiggins's own 28°F hard-freeze dates, about Apr 30 and Oct 10 and the ~163-day span between themNOAA 1991–2020 Climate Normals
- 48 documented contamination sites on the federal record near Wiggins, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Wiggins's boundary and the 847 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~163-day seasonGrowable Ground crop-matching engine
- The ecoregion at Wiggins's own centroid, the High PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Wiggins's 847 acres read through its county's SSURGO summaryfrom Morgan County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Morgan County
- The growing challenges every Colorado grower plans around — written at state scale, so they stay on the state guidefrom Colorado
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Morgan County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Wiggins's 847 acreswhy one lot differs from the next →
- Which side of Wiggins you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 847 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 miles 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 Wiggins-wide figureread your own land →
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