Devon, Kansas, sits in USDA hardiness zone 6b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, hazelnut, lavender, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Devon, 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 Devon 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 Devon — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Devon — the short answer
Devon, Kansas: USDA zone 6b, about 225 days between hard freezes, across 451 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 28
- 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
- ~225
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 451 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 6b is Devon's average, not your lot's — a low corner or a tree line moves it. Against Devon's 225-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Devon
Each reading below is measured for Devon itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredDevon runs about 225 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
MeasuredDevon sits in USDA hardiness zone 6b.
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 Devon is in
Devon sits in the Central Irregular Plains — EPA Level III, inside the wider Great Plains. That is read at Devon's own centroid rather than borrowed from Bourbon County.
What Grows in Devon
Every plant below cleared Devon's own zone 6b and its 225-day season. Each card opens that plant's Kansas profile. How we score.
Is it too late to plant in Devon?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 28; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 28 (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. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
What's on the federal record near Devon
Closest first, within ~10 miles of Devon. Listing isn't leaking, and distance isn't exposure.
- HOWARDS SERVICE STATIONUnderground Storage Tanks · 3.4 mi
- 24S 24E 23B 01Nitrate · 4.2 mi
- BOURBON BARRELLUnderground Storage Tanks · 4.5 mi
- 25S 23E 15CCD 01Nitrate · 5.1 mi
- BOYDS SERVICE STATIONUnderground Storage Tanks · 5.2 mi
- 24S 23E 03BCC 01Nitrate · 5.7 mi
- 24S 23E 04DB 01Nitrate · 5.8 mi
- PUMP'N PETE'S #20Underground Storage Tanks · 7.3 mi
- FINDLEY AUTO BODYBrownfields · 7.7 mi
- B & D MOTOR PART-CITY FORT SCOUnderground Storage Tanks · 7.8 mi
- 25S 25E 30BC 01Nitrate · 7.9 mi
- HILL'S SERVICE INCUnderground Storage Tanks · 7.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Devon'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 Devon.
Total Sites
80
within ~10 miles of Devon
Risk Level
Moderate
Highest-severity
4 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Devon
Severity Distribution
within ~10 miles of Devon
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 Devon
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 Devon average
Your land is one point inside Devon
Everything above resolves to Devon as a whole — one PHZM band and one 28°F frost record, read across 451 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 Devon Average
Devon Average
- ●USDA Zones 6b, averaged across Devon
- ●One soil character for all of Devon
- ●Frost dates read at Devon's scale: Mar 28 to Nov 8
YOUR Parcel
- ✓Your exact zone, not Devon's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Devon
Pull a site-specific report for your exact address in Devon, Kansas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Devon averages can't show:
We read public map data around Devon — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Devon average
How we know this about Devon
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 Devon’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 Devon
When does frost risk typically end in Devon?
The last hard freeze (28°F) in Devon typically lands around Mar 28, 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 18.
When is the first frost in Devon?
The first hard freeze (28°F) in Devon 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 225 days after the spring freeze cleared.
How long is the growing season in Devon?
Measured between 28°F hard freezes, Devon sees about 225 frost-free days — roughly Mar 28 through Nov 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 18 to Oct 25, about 190 days.
Is the soil safe to grow vegetables in Devon?
The federal record around Devon shows 80 documented sites, mostly Underground Storage Tanks entries (37), the nearest Underground Storage Tanks record about 3.4 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Devon?
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 Devon's scale — its 6b band and its 225-day season. Your yard writes its own version of Devon'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 Devon’s own scale
6 of the readings below were taken at Devon's own scale — its own ~225-day season between 28°F freezes, the 451 acres it covers and 80 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Devon's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Devon's own 28°F hard-freeze dates, about Mar 28 and Nov 8 and the ~225-day span between themNOAA 1991–2020 Climate Normals
- 80 documented contamination sites on the federal record near Devon, the closest Underground Storage Tanks record about 3.4 miles out from the town centreFederal environmental registers
- Devon's boundary and the 451 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~225-day seasonGrowable Ground crop-matching engine
- The ecoregion at Devon's own centroid, the Central Irregular PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Devon's 451 acres read through its county's SSURGO summaryfrom Bourbon County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Bourbon County
- The growing challenges every Kansas grower plans around — written at state scale, so they stay on the state guidefrom Kansas
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Bourbon County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Devon's 451 acreswhy one lot differs from the next →
- Which side of Devon you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 451 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 3.4 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 Devon-wide figureread your own land →