Walker, Missouri, sits in USDA hardiness zone 7a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Well-matched crops include cabbage, hazelnut, california poppy, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Walker, 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 Walker 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 Walker — soil, climate, flood, and parcel records. How we handle your address.
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Walker — the short answer
Walker, Missouri: USDA zone 7a, about 228 days between hard freezes, across 199 acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~228
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 199 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 7a is Walker's average, not your lot's — a low corner or a tree line moves it. Against Walker's 228-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Walker
Each reading below is measured for Walker itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWalker runs about 228 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredWalker sits in USDA hardiness zone 7a.
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 Walker is in
Walker sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. That is read at Walker's own centroid rather than borrowed from Vernon County.
What Grows in Walker
Every plant below cleared Walker's own zone 7a and its 228-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Walker?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Feb 25; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 25 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 8 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
What's on the federal record near Walker
Closest first, within ~10 miles of Walker. Listing isn't leaking, and distance isn't exposure.
- T36N R30W 15BCC1Nitrate · 150 ft
- WALKER MAINT LOTUnderground Storage Tanks · 1.0 mi
- VERNON COUNTY CONS PWSD 1PFAS · 1.5 mi
- ARNOLD FARMS PORK LLCCAFO · 2.5 mi
- WHITEMAN AFB HOTEL-10Underground Storage Tanks · 2.7 mi
- WALKERUnderground Storage Tanks · 3.5 mi
- T36N R29W 07DBD1Nitrate · 3.8 mi
- DON DIRKSCAFO · 3.9 mi
- T36N R29W 17CDD1Nitrate · 4.5 mi
- KOEHN, TERRYCAFO · 4.6 mi
- T37N R31W 36ABD1Nitrate · 4.7 mi
- SCHMIDT, STEVENCAFO · 5.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Walker'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 Walker.
Total Sites
113
within ~10 miles of Walker
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Walker
Severity Distribution
within ~10 miles of Walker
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Walker, two things run higher than the national average within ~10 miles of Walker — CAFO (7 sites) and Nitrate (32 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Walker
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 Walker average
Your land is one point inside Walker
Everything above resolves to Walker as a whole — one PHZM band and one 28°F frost record, read across 199 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 Walker Average
Walker Average
- ●USDA Zones 7a, averaged across Walker
- ●One soil character for all of Walker
- ●Frost dates read at Walker's scale: Mar 25 to Nov 8
YOUR Parcel
- ✓Your exact zone, not Walker's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Walker
Pull a site-specific report for your exact address in Walker, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Walker averages can't show:
We read public map data around Walker — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Walker average
How we know this about Walker
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 Walker’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 Walker
When does frost risk typically end in Walker?
The last hard freeze (28°F) in Walker typically lands around Mar 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 Apr 15.
When is the first frost in Walker?
The first hard freeze (28°F) in Walker typically arrives around Nov 8, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 25, so the watching starts about Oct 9 — about 228 days after the spring freeze cleared.
How long is the growing season in Walker?
Measured between 28°F hard freezes, Walker sees about 228 frost-free days — roughly Mar 25 through Nov 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 15 to Oct 25, about 193 days.
Is the soil safe to grow vegetables in Walker?
The federal record around Walker is a meaningful one — 113 documented sites, mostly Underground Storage Tanks entries (50), the nearest Nitrate 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 Walker?
From about Oct 9 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 Nov 8 (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 Nov 8. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Walker's scale — its 7a band and its 228-day season. Your yard writes its own version of Walker'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 Walker’s own scale
6 of the readings below were taken at Walker's own scale — its own ~228-day season between 28°F freezes, the 199 acres it covers and 113 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Walker's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Walker's own 28°F hard-freeze dates, about Mar 25 and Nov 8 and the ~228-day span between themNOAA 1991–2020 Climate Normals
- 113 documented contamination sites on the federal record near Walker, the closest Nitrate record under a tenth of a mile out from the town centreFederal environmental registers
- Walker's boundary and the 199 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~228-day seasonGrowable Ground crop-matching engine
- The ecoregion at Walker's own centroid, the Central Irregular PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Walker's 199 acres read through its county's SSURGO summaryfrom Vernon County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Vernon County
- The growing challenges every Missouri grower plans around — written at state scale, so they stay on the state guidefrom Missouri
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Vernon County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Walker's 199 acreswhy one lot differs from the next →
- Which side of Walker you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 199 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate 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 Walker-wide figureread your own land →
More in Missouri
Wider growing context
What grows across MissouriWalker sits outside our named growing regions, so Missouri as a whole is its closest context here.
Nearby growing guides