Ellicott, Colorado, sits in USDA hardiness zone 6a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Crops well matched to these conditions include cabbage, blackberry, california poppy, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Ellicott, 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 Ellicott 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 Ellicott — soil, climate, flood, and parcel records. How we handle your address.
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Ellicott — the short answer
Ellicott, Colorado: USDA zone 6a, about 170 days between hard freezes, across 7K acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 26
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~170
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 7K 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 Ellicott's average, not your lot's — a low corner or a tree line moves it. Against Ellicott's 170-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Ellicott
Each reading below is measured for Ellicott itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredEllicott runs about 170 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
MeasuredEllicott 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 Ellicott is in
Ellicott sits in the Southwestern Tablelands — EPA Level III, inside the wider Great Plains. That is read at Ellicott's own centroid rather than borrowed from El Paso County.
What Grows in Ellicott
Every plant below cleared Ellicott's own zone 6a and its 170-day season. Each card opens that plant's Colorado profile. How we score.
Is it too late to plant in Ellicott?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 29; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 26 (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. As the window narrows, the plantings just get faster — fall brassicas, then greens, then garlic to finish.
What's on the federal record near Ellicott
Closest first, within ~10 miles of Ellicott. Listing isn't leaking, and distance isn't exposure.
- SC01406313DAA2Nitrate · 1400 ft
- SC01406218BDC CONitrate · 0.7 mi
- SC01406218DDD1Nitrate · 0.7 mi
- Fuel B Convenience StopUnderground Storage Tanks · 1.0 mi
- SC01406217AAC1Nitrate · 1.1 mi
- SC01406220BCANitrate · 1.1 mi
- SC01406230ABBNitrate · 1.3 mi
- SC01406229BBA CHEROKEE 19 (DUNCAN)Nitrate · 1.4 mi
- SC01406314AAANitrate · 1.5 mi
- SC01406312ADA LFHMAS03Nitrate · 1.6 mi
- SC01406207BCB ARAPMAS24Nitrate · 1.7 mi
- SC01406205CAA CHEROKEE 3Nitrate · 2.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Ellicott'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 Ellicott.
Total Sites
106
within ~10 miles of Ellicott
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Ellicott
Severity Distribution
within ~10 miles of Ellicott
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Ellicott, Nitrate runs higher than the national average — 98 sites within ~10 miles of Ellicott. 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 Ellicott
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 Ellicott average
Your land is one point inside Ellicott
Everything above resolves to Ellicott as a whole — one PHZM band and one 28°F frost record, read across 7K 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 Ellicott Average
Ellicott Average
- ●USDA Zones 6a, averaged across Ellicott
- ●One soil character for all of Ellicott
- ●Frost dates read at Ellicott's scale: Apr 26 to Oct 13
YOUR Parcel
- ✓Your exact zone, not Ellicott's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Ellicott
Pull a site-specific report for your exact address in Ellicott, Colorado — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Ellicott averages can't show:
We read public map data around Ellicott — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Ellicott average
How we know this about Ellicott
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 Ellicott’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 Ellicott
When does frost risk typically end in Ellicott?
The last hard freeze (28°F) in Ellicott typically lands around Apr 26, 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 17.
When is the first frost in Ellicott?
The first hard freeze (28°F) in Ellicott typically arrives around Oct 13, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 29, so the watching starts about Sep 13 — about 170 days after the spring freeze cleared.
How long is the growing season in Ellicott?
Measured between 28°F hard freezes, Ellicott sees about 170 frost-free days — roughly Apr 26 through Oct 13, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 17 to Sep 29, about 135 days.
Is the soil safe to grow vegetables in Ellicott?
The federal record around Ellicott is a meaningful one — 106 documented sites, mostly Nitrate entries (98), the nearest Nitrate record about 0.3 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 Ellicott?
From about Sep 13 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 13 (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 13. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Ellicott's scale — its 6a band and its 170-day season. Your yard writes its own version of Ellicott'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 Ellicott’s own scale
6 of the readings below were taken at Ellicott's own scale — its own ~170-day season between 28°F freezes, the 6,990 acres it covers and 106 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Ellicott's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Ellicott's own 28°F hard-freeze dates, about Apr 26 and Oct 13 and the ~170-day span between themNOAA 1991–2020 Climate Normals
- 106 documented contamination sites on the federal record near Ellicott, the closest Nitrate record about 0.3 miles out from the town centreFederal environmental registers
- Ellicott's boundary and the 6,990 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~170-day seasonGrowable Ground crop-matching engine
- The ecoregion at Ellicott's own centroid, the Southwestern TablelandsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Ellicott's 6,990 acres read through its county's SSURGO summaryfrom El Paso County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom El Paso 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 El Paso County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Ellicott's 6,990 acreswhy one lot differs from the next →
- Which side of Ellicott you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 6,990 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.3 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 Ellicott-wide figureread your own land →
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