Strasburg, Colorado, sits in USDA hardiness zone 5b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Growers here do well with cabbage, cranberry, lavender, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Strasburg, 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 Strasburg 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 Strasburg — soil, climate, flood, and parcel records. How we handle your address.
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Strasburg — the short answer
Strasburg, Colorado: USDA zone 5b, about 176 days between hard freezes, across 13K acres of town.
- USDA zone
- 5b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~176
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 13K 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 5b is Strasburg's average, not your lot's — a low corner or a tree line moves it. Against Strasburg's 176-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Strasburg
Each reading below is measured for Strasburg itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredStrasburg runs about 176 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
MeasuredStrasburg sits in USDA hardiness zone 5b.
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 Strasburg is in
Strasburg sits in the High Plains — EPA Level III, inside the wider Great Plains. That is read at Strasburg's own centroid rather than borrowed from Arapahoe County.
What Grows in Strasburg
Every plant below cleared Strasburg's own zone 5b and its 176-day season. Each card opens that plant's Colorado profile. How we score.
Is it too late to plant in Strasburg?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 28; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 25 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 18 — 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.
What's on the federal record near Strasburg
Closest first, within ~10 miles of Strasburg. Listing isn't leaking, and distance isn't exposure.
- Strasburg Self Serve GasUnderground Storage Tanks · 1.1 mi
- Petro MatUnderground Storage Tanks · 1.2 mi
- Roy H FUnderground Storage Tanks · 1.2 mi
- Intermountain Rural ElectricUnderground Storage Tanks · 1.2 mi
- Phil B RiceUnderground Storage Tanks · 1.2 mi
- Rays Gas & TireUnderground Storage Tanks · 1.2 mi
- Ken Yates PropertyUnderground Storage Tanks · 1.3 mi
- Suburban PropaneUnderground Storage Tanks · 1.3 mi
- Strasburg Store IncUnderground Storage Tanks · 1.3 mi
- D&D WATER SERVICE LLCBrownfields · 1.4 mi
- Former Crandall Drilling CoUnderground Storage Tanks · 1.6 mi
- Strasburg School District 31-jUnderground Storage Tanks · 1.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Strasburg'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 Strasburg.
Total Sites
59
within ~10 miles of Strasburg
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Strasburg
Severity Distribution
within ~10 miles of Strasburg
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Strasburg, Nitrate runs higher than the national average — 18 sites within ~10 miles of Strasburg. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Strasburg
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 Strasburg average
Your land is one point inside Strasburg
Everything above resolves to Strasburg as a whole — one PHZM band and one 28°F frost record, read across 13K 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 Strasburg Average
Strasburg Average
- ●USDA Zones 5b, averaged across Strasburg
- ●One soil character for all of Strasburg
- ●Frost dates read at Strasburg's scale: Apr 25 to Oct 18
YOUR Parcel
- ✓Your exact zone, not Strasburg's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Strasburg
Pull a site-specific report for your exact address in Strasburg, Colorado — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Strasburg averages can't show:
We read public map data around Strasburg — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Strasburg average
How we know this about Strasburg
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 Strasburg’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 Strasburg
When does frost risk typically end in Strasburg?
The last hard freeze (28°F) in Strasburg typically lands around Apr 25, 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 16.
When is the first frost in Strasburg?
The first hard freeze (28°F) in Strasburg typically arrives around Oct 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 4, so the watching starts about Sep 18 — about 176 days after the spring freeze cleared.
How long is the growing season in Strasburg?
Measured between 28°F hard freezes, Strasburg sees about 176 frost-free days — roughly Apr 25 through Oct 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 16 to Oct 4, about 141 days.
Is the soil safe to grow vegetables in Strasburg?
The federal record around Strasburg is a meaningful one — 59 documented sites, mostly Underground Storage Tanks entries (31), the nearest Underground Storage Tanks record about 1.1 miles out — 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 Strasburg?
From about Sep 18 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 18 (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 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Strasburg's scale — its 5b band and its 176-day season. Your yard writes its own version of Strasburg'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 Strasburg’s own scale
6 of the readings below were taken at Strasburg's own scale — its own ~176-day season between 28°F freezes, the 13,313 acres it covers and 59 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Strasburg's own USDA hardiness band, zones 5bUSDA PHZM 2023
- Strasburg's own 28°F hard-freeze dates, about Apr 25 and Oct 18 and the ~176-day span between themNOAA 1991–2020 Climate Normals
- 59 documented contamination sites on the federal record near Strasburg, the closest Underground Storage Tanks record about 1.1 miles out from the town centreFederal environmental registers
- Strasburg's boundary and the 13,313 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5b and a ~176-day seasonGrowable Ground crop-matching engine
- The ecoregion at Strasburg's own centroid, the High PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Strasburg's 13,313 acres read through its county's SSURGO summaryfrom Arapahoe County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Arapahoe 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 Arapahoe County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Strasburg's 13,313 acreswhy one lot differs from the next →
- Which side of Strasburg you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 13,313 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 1.1 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 Strasburg-wide figureread your own land →