Lakewood, Colorado, sits in USDA hardiness zone 6a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, blackberry, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Lakewood, 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 Lakewood 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 Lakewood — soil, climate, flood, and parcel records. How we handle your address.
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Lakewood — the short answer
Lakewood, Colorado: USDA zone 6a, about 175 days between hard freezes, across 28K acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 23
- 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
- ~175
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 28K 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 Lakewood's average, not your lot's — a low corner or a tree line moves it. Against Lakewood's 175-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Lakewood
Each reading below is measured for Lakewood itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLakewood runs about 175 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
MeasuredLakewood 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 Lakewood is in
Lakewood sits in the High Plains — EPA Level III, inside the wider Great Plains. That is read at Lakewood'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 Lakewood
Every plant below cleared Lakewood's own zone 6a and its 175-day season. Each card opens that plant's Colorado profile. How we score.
Is it too late to plant in Lakewood?
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 26; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 23 (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 Lakewood
Closest first, within ~10 miles of Lakewood. Listing isn't leaking, and distance isn't exposure.
- Basa LLCUnderground Storage Tanks · 2000 ft
- Shell OilUnderground Storage Tanks · 0.6 mi
- King Soopers Fuel Center #59Underground Storage Tanks · 0.6 mi
- Everyday Store #5713Underground Storage Tanks · 0.6 mi
- WATER & POWER RESOURCESSuperfund · 0.6 mi
- KING SOOPERS 59Brownfields · 0.7 mi
- Brads ConocoUnderground Storage Tanks · 0.7 mi
- Westland Bible Baptist ChurchUnderground Storage Tanks · 0.8 mi
- Green Mountain Grease MonkeyUnderground Storage Tanks · 0.8 mi
- Alameda U-Pump-It #806Underground Storage Tanks · 0.8 mi
- Rivera Auto Service CenterUnderground Storage Tanks · 0.8 mi
- Sun TransmissionUnderground Storage Tanks · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Lakewood'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 Lakewood.
Sources Checked
within ~10 miles of Lakewood
Severity Distribution
within ~10 miles of Lakewood
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.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Lakewood
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 Lakewood average
Your land is one point inside Lakewood
Everything above resolves to Lakewood as a whole — one PHZM band and one 28°F frost record, read across 28K 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 Lakewood Average
Lakewood Average
- ●USDA Zones 6a, averaged across Lakewood
- ●One soil character for all of Lakewood
- ●Frost dates read at Lakewood's scale: Apr 23 to Oct 15
YOUR Parcel
- ✓Your exact zone, not Lakewood's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Lakewood
Pull a site-specific report for your exact address in Lakewood, Colorado — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Lakewood averages can't show:
We read public map data around Lakewood — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Lakewood average
How we know this about Lakewood
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 Lakewood’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 Lakewood
When does frost risk typically end in Lakewood?
The last hard freeze (28°F) in Lakewood typically lands around Apr 23, 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 14.
When is the first frost in Lakewood?
The first hard freeze (28°F) in Lakewood 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 175 days after the spring freeze cleared.
How long is the growing season in Lakewood?
Measured between 28°F hard freezes, Lakewood sees about 175 frost-free days — roughly Apr 23 through Oct 15, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 14 to Oct 1, about 140 days.
Is the soil safe to grow vegetables in Lakewood?
The federal record around Lakewood runs heavier than most — 3,850 documented sites, mostly Underground Storage Tanks entries (2,328), the nearest Underground Storage Tanks record about 0.4 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 Lakewood?
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 Lakewood's scale — its 6a band and its 175-day season. Your yard writes its own version of Lakewood'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 Lakewood’s own scale
6 of the readings below were taken at Lakewood's own scale — its own ~175-day season between 28°F freezes, the 27,827 acres it covers and 3,850 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Lakewood's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Lakewood's own 28°F hard-freeze dates, about Apr 23 and Oct 15 and the ~175-day span between themNOAA 1991–2020 Climate Normals
- 3,850 documented contamination sites on the federal record near Lakewood, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Lakewood's boundary and the 27,827 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~175-day seasonGrowable Ground crop-matching engine
- Lakewood 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 Lakewood's 27,827 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 Lakewood's 27,827 acreswhy one lot differs from the next →
- Which side of Lakewood you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 27,827 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.4 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 Lakewood-wide figureread your own land →
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