Edgewater, Colorado, sits in USDA hardiness zone 6a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Reliable performers under these conditions include cabbage, blackberry, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Edgewater, 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 Edgewater 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 Edgewater — soil, climate, flood, and parcel records. How we handle your address.
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Edgewater — the short answer
Edgewater, Colorado: USDA zone 6a, about 176 days between hard freezes, across 445 acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 22
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 15
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~176
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 445 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 6a is Edgewater's average, not your lot's — a low corner or a tree line moves it. Against Edgewater's 176-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Edgewater
Each reading below is measured for Edgewater itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredEdgewater 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
MeasuredEdgewater sits in USDA hardiness zone 6a.
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 Edgewater is in
Edgewater sits in the High Plains — EPA Level III, inside the wider Great Plains. That is read at Edgewater's own centroid, and it is not what its county reads: Jefferson County is mostly Southern Rockies. The wider page above you is answering a different question about different ground.
What Grows in Edgewater
Every plant below cleared Edgewater's own zone 6a and its 176-day season. Each card opens that plant's Colorado profile. How we score.
Is it too late to plant in Edgewater?
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 25; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 22 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 15 — long-season crops need about 90 days of runway, quick greens only 30. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
What's on the federal record near Edgewater
Closest first, within ~10 miles of Edgewater. Listing isn't leaking, and distance isn't exposure.
- City Of EdgewaterUnderground Storage Tanks · 1200 ft
- City Of Edgewater Public WorksUnderground Storage Tanks · 1200 ft
- Shop N SaveUnderground Storage Tanks · 1300 ft
- Former Nelson's CornerUnderground Storage Tanks · 1500 ft
- Don WheelockUnderground Storage Tanks · 1700 ft
- Jim OlsonUnderground Storage Tanks · 2200 ft
- Unknown OwnerUnderground Storage Tanks · 0.5 mi
- Gas StopUnderground Storage Tanks · 0.5 mi
- CAMBRIDGE CARE CENTERBrownfields · 0.5 mi
- Eugene M BraceUnderground Storage Tanks · 0.5 mi
- Brennan Kammerzell PropertyUnderground Storage Tanks · 0.5 mi
- Grease MonkeyUnderground Storage Tanks · 0.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Edgewater'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 Edgewater.
Sources Checked
within ~10 miles of Edgewater
Severity Distribution
within ~10 miles of Edgewater
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.
- •TRI facilities report what they release. Check the wind — downwind beds catch more of it.
Check your specific parcel in Edgewater
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 Edgewater average
Your land is one point inside Edgewater
Everything above resolves to Edgewater as a whole — one PHZM band and one 28°F frost record, read across 445 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 city 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 Edgewater Average
Edgewater Average
- ●USDA Zones 6a, averaged across Edgewater
- ●One soil character for all of Edgewater
- ●Frost dates read at Edgewater's scale: Apr 22 to Oct 15
YOUR Parcel
- ✓Your exact zone, not Edgewater's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Edgewater
Pull a site-specific report for your exact address in Edgewater, Colorado — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Edgewater averages can't show:
We read public map data around Edgewater — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Edgewater average
How we know this about Edgewater
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Edgewater’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 city grain anywhere on this page — there is no city-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 Edgewater
When does frost risk typically end in Edgewater?
The last hard freeze (28°F) in Edgewater typically lands around Apr 22, 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 13.
When is the first frost in Edgewater?
The first hard freeze (28°F) in Edgewater typically arrives around Oct 15, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 1, so the watching starts about Sep 15 — about 176 days after the spring freeze cleared.
How long is the growing season in Edgewater?
Measured between 28°F hard freezes, Edgewater sees about 176 frost-free days — roughly Apr 22 through Oct 15, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 13 to Oct 1, about 141 days.
Is the soil safe to grow vegetables in Edgewater?
The federal record around Edgewater runs heavier than most — 5,121 documented sites, mostly Underground Storage Tanks entries (3,044), the nearest Underground Storage Tanks record about 0.2 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Edgewater?
From about Sep 15 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 15 (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 15. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Edgewater's scale — its 6a band and its 176-day season. Your yard writes its own version of Edgewater'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 Edgewater’s own scale
6 of the readings below were taken at Edgewater's own scale — its own ~176-day season between 28°F freezes, the 445 acres it covers and 5,121 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Edgewater's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Edgewater's own 28°F hard-freeze dates, about Apr 22 and Oct 15 and the ~176-day span between themNOAA 1991–2020 Climate Normals
- 5,121 documented contamination sites on the federal record near Edgewater, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Edgewater's boundary and the 445 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~176-day seasonGrowable Ground crop-matching engine
- Edgewater sits in the High 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 Edgewater's 445 acres read through its county's SSURGO summaryfrom Jefferson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Jefferson 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 Jefferson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Edgewater's 445 acreswhy one lot differs from the next →
- Which side of Edgewater you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 445 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 Edgewater-wide figureread your own land →
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