Purdin, Missouri, sits in USDA hardiness zone 6a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Crops well matched to these conditions include cabbage, hazelnut, lavender, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Purdin, 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 Purdin 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 Purdin — soil, climate, flood, and parcel records. How we handle your address.
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Purdin — the short answer
Purdin, Missouri: USDA zone 6a, about 209 days between hard freezes, across 196 acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~209
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 196 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 Purdin's average, not your lot's — a low corner or a tree line moves it. Against Purdin's 209-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Purdin
Each reading below is measured for Purdin itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredPurdin runs about 209 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
MeasuredPurdin 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 Purdin is in
Purdin sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. That is read at Purdin's own centroid rather than borrowed from Linn County.
What Grows in Purdin
Every plant below cleared Purdin's own zone 6a and its 209-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Purdin?
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 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 30 — 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 Purdin
Closest first, within ~10 miles of Purdin. Listing isn't leaking, and distance isn't exposure.
- SMITH'S GARAGEUnderground Storage Tanks · 1200 ft
- T60N R21W 36ACNitrate · 2.4 mi
- T58N R21WNitrate · 5.0 mi
- CURLEY'S CORNERUnderground Storage Tanks · 5.0 mi
- POWELL MTRSUnderground Storage Tanks · 5.0 mi
- T58N R20W 06ACB1Nitrate · 5.3 mi
- T58N R20W 04DAC1Nitrate · 5.4 mi
- T59N R21W 09BBB1Nitrate · 5.5 mi
- BROWNING FARM SUPPLY INCUnderground Storage Tanks · 5.8 mi
- T60N R20W 08CAD1Nitrate · 5.9 mi
- T60N R20W 08CAA1Nitrate · 6.0 mi
- DONOHO BARNCAFO · 6.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Purdin'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 Purdin.
Total Sites
29
within ~10 miles of Purdin
Risk Level
Low
Highest-severity
3 concentrated animal feeding operations
Sources Checked
within ~10 miles of Purdin
Severity Distribution
within ~10 miles of Purdin
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Purdin, two things run higher than the national average within ~10 miles of Purdin — CAFO (3 sites) and Nitrate (20 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 Purdin
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 Purdin average
Your land is one point inside Purdin
Everything above resolves to Purdin as a whole — one PHZM band and one 28°F frost record, read across 196 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 Purdin Average
Purdin Average
- ●USDA Zones 6a, averaged across Purdin
- ●One soil character for all of Purdin
- ●Frost dates read at Purdin's scale: Apr 4 to Oct 30
YOUR Parcel
- ✓Your exact zone, not Purdin's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Purdin
Pull a site-specific report for your exact address in Purdin, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Purdin averages can't show:
We read public map data around Purdin — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Purdin average
How we know this about Purdin
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 Purdin’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 Purdin
When does frost risk typically end in Purdin?
The last hard freeze (28°F) in Purdin typically lands around Apr 4, 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 25.
When is the first frost in Purdin?
The first hard freeze (28°F) in Purdin typically arrives around Oct 30, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 16, so the watching starts about Sep 30 — about 209 days after the spring freeze cleared.
How long is the growing season in Purdin?
Measured between 28°F hard freezes, Purdin sees about 209 frost-free days — roughly Apr 4 through Oct 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 25 to Oct 16, about 174 days.
Is the soil safe to grow vegetables in Purdin?
The federal record around Purdin is light — 29 documented sites across the 9 federal source types we checked, mostly Nitrate entries (20), the nearest Underground Storage Tanks record about 0.2 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do I protect my plants from frost in Purdin?
From about Sep 30 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 30 (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 30. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Purdin's scale — its 6a band and its 209-day season. Your yard writes its own version of Purdin'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 Purdin’s own scale
6 of the readings below were taken at Purdin's own scale — its own ~209-day season between 28°F freezes, the 196 acres it covers and 29 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Purdin's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Purdin's own 28°F hard-freeze dates, about Apr 4 and Oct 30 and the ~209-day span between themNOAA 1991–2020 Climate Normals
- 29 documented contamination sites on the federal record near Purdin, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Purdin's boundary and the 196 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~209-day seasonGrowable Ground crop-matching engine
- The ecoregion at Purdin's own centroid, the Central Irregular PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Purdin's 196 acres read through its county's SSURGO summaryfrom Linn County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Linn 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 Linn County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Purdin's 196 acreswhy one lot differs from the next →
- Which side of Purdin you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 196 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 Purdin-wide figureread your own land →
More in Missouri
Wider growing context
What grows across MissouriPurdin sits outside our named growing regions, so Missouri as a whole is its closest context here.
Nearby growing guides