Reardan, Washington, sits in USDA hardiness zone 6a — a zone band wide enough that plant choice, not possibility, is the interesting question.
On paper, cabbage, blackberry, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Reardan, 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 Reardan 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 Reardan — soil, climate, flood, and parcel records. How we handle your address.
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Reardan — the short answer
Reardan, Washington: USDA zone 6a, about 176 days between hard freezes, across 317 acres of town.
- 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
- Town area
- 317 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 Reardan's average, not your lot's — a low corner or a tree line moves it. Against Reardan's 176-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Reardan
Each reading below is measured for Reardan itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredReardan 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
MeasuredReardan 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 Reardan is in
Reardan sits in the Columbia Plateau — EPA Level III, inside the wider North American Deserts. That is read at Reardan's own centroid rather than borrowed from Lincoln County.
What Grows in Reardan
Every plant below cleared Reardan's own zone 6a and its 176-day season. Each card opens that plant's Washington profile. How we score.
Is it too late to plant in Reardan?
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. 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 Reardan
Closest first, within ~10 miles of Reardan. Listing isn't leaking, and distance isn't exposure.
- LONGS SERVICEUnderground Storage Tanks · 200 ft
- WA DOT LAUREL STREET REARDANUnderground Storage Tanks · 250 ft
- REARDAN GAS STATIONUnderground Storage Tanks · 300 ft
- COLVILLES GARAGE INCUnderground Storage Tanks · 300 ft
- DOT LAKE STREET REARDANUnderground Storage Tanks · 500 ft
- BUS MAINTENANCE FACILITYUnderground Storage Tanks · 1500 ft
- WESTERN FARM SERVICE INC REARDANUnderground Storage Tanks · 4.8 mi
- NES FARMS INCUnderground Storage Tanks · 4.8 mi
- ROSMAR FARMS INCUnderground Storage Tanks · 5.2 mi
- LYKA CORPORATIONUnderground Storage Tanks · 5.2 mi
- JUNE WILSON COONSUnderground Storage Tanks · 5.2 mi
- ARNOLD MITTELSTAEDTUnderground Storage Tanks · 5.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Reardan'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 Reardan.
Total Sites
42
within ~10 miles of Reardan
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Reardan
Severity Distribution
within ~10 miles of Reardan
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Reardan, Nitrate runs higher than the national average — 16 sites within ~10 miles of Reardan. That's not a problem with your land — it's information about 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 Reardan
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 Reardan average
Your land is one point inside Reardan
Everything above resolves to Reardan as a whole — one PHZM band and one 28°F frost record, read across 317 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 Reardan Average
Reardan Average
- ●USDA Zones 6a, averaged across Reardan
- ●One soil character for all of Reardan
- ●Frost dates read at Reardan's scale: Apr 22 to Oct 15
YOUR Parcel
- ✓Your exact zone, not Reardan's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Reardan
Pull a site-specific report for your exact address in Reardan, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Reardan averages can't show:
We read public map data around Reardan — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Reardan average
How we know this about Reardan
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 Reardan’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 Reardan
When does frost risk typically end in Reardan?
The last hard freeze (28°F) in Reardan 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 Reardan?
The first hard freeze (28°F) in Reardan 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 Reardan?
Measured between 28°F hard freezes, Reardan 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 Reardan?
The federal record around Reardan is a meaningful one — 42 documented sites, mostly Underground Storage Tanks entries (20), the nearest Underground Storage Tanks record under a tenth of a mile 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 Reardan?
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 Reardan's scale — its 6a band and its 176-day season. Your yard writes its own version of Reardan'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 Reardan’s own scale
6 of the readings below were taken at Reardan's own scale — its own ~176-day season between 28°F freezes, the 317 acres it covers and 42 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Reardan's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Reardan's own 28°F hard-freeze dates, about Apr 22 and Oct 15 and the ~176-day span between themNOAA 1991–2020 Climate Normals
- 42 documented contamination sites on the federal record near Reardan, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Reardan's boundary and the 317 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~176-day seasonGrowable Ground crop-matching engine
- The ecoregion at Reardan's own centroid, the Columbia PlateauUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Reardan's 317 acres read through its county's SSURGO summaryfrom Lincoln County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Lincoln County
- The growing challenges every Washington grower plans around — written at state scale, so they stay on the state guidefrom Washington
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Lincoln County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Reardan's 317 acreswhy one lot differs from the next →
- Which side of Reardan you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 317 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 Reardan-wide figureread your own land →
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