Haven, Kansas, sits in USDA hardiness zone 6b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Well-matched crops include cabbage, hazelnut, lavender, 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 Haven, 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 Haven 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 Haven — soil, climate, flood, and parcel records. How we handle your address.
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Haven — the short answer
Haven, Kansas: USDA zone 6b, about 221 days between hard freezes, across 497 acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 31
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~221
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 497 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 Haven's average, not your lot's — a low corner or a tree line moves it. Against Haven's 221-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Haven
Each reading below is measured for Haven itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHaven runs about 221 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
MeasuredHaven 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 Haven is in
Haven sits in the Central Great Plains — EPA Level III, inside the wider Great Plains. That is read at Haven's own centroid rather than borrowed from Reno County.
What Grows in Haven
Every plant below cleared Haven's own zone 6b and its 221-day season. Each card opens that plant's Kansas profile. How we score.
Is it too late to plant in Haven?
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 3; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 31 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 7 — 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 Haven
Closest first, within ~10 miles of Haven. Listing isn't leaking, and distance isn't exposure.
- BLAKE SVC & SUPPLYBrownfields · 150 ft
- HAVEN FORD SALESBrownfields · 350 ft
- HAVEN FORD SALES INCUnderground Storage Tanks · 500 ft
- HAVEN COOP OIL CO.Underground Storage Tanks · 750 ft
- MID KANSAS COOP-HAVENUnderground Storage Tanks · 750 ft
- R B RPRBrownfields · 850 ft
- SHEP CHEVROLET, INC.Underground Storage Tanks · 850 ft
- SHEP CHEVROLET INCBrownfields · 850 ft
- HAVEN REDI MIXBrownfields · 900 ft
- KABREDLO'S #266Underground Storage Tanks · 950 ft
- USD #312Underground Storage Tanks · 1200 ft
- COLOR BY DESIGN INCBrownfields · 1200 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Haven'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 Haven.
Total Sites
199
within ~10 miles of Haven
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Haven
Severity Distribution
within ~10 miles of Haven
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Haven, Nitrate runs higher than the national average — 148 sites within ~10 miles of Haven. 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 Haven
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 Haven average
Your land is one point inside Haven
Everything above resolves to Haven as a whole — one PHZM band and one 28°F frost record, read across 497 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 Haven Average
Haven Average
- ●USDA Zones 6b, averaged across Haven
- ●One soil character for all of Haven
- ●Frost dates read at Haven's scale: Mar 31 to Nov 7
YOUR Parcel
- ✓Your exact zone, not Haven's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Haven
Pull a site-specific report for your exact address in Haven, Kansas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Haven averages can't show:
We read public map data around Haven — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Haven average
How we know this about Haven
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 Haven’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 Haven
When does frost risk typically end in Haven?
The last hard freeze (28°F) in Haven typically lands around Mar 31, 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 21.
When is the first frost in Haven?
The first hard freeze (28°F) in Haven typically arrives around Nov 7, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 24, so the watching starts about Oct 8 — about 221 days after the spring freeze cleared.
How long is the growing season in Haven?
Measured between 28°F hard freezes, Haven sees about 221 frost-free days — roughly Mar 31 through Nov 7, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 21 to Oct 24, about 186 days.
Is the soil safe to grow vegetables in Haven?
The federal record around Haven is a meaningful one — 199 documented sites, mostly Nitrate entries (148), the nearest Brownfields 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 Haven?
From about Oct 8 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 7 (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 7. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Haven's scale — its 6b band and its 221-day season. Your yard writes its own version of Haven'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 Haven’s own scale
6 of the readings below were taken at Haven's own scale — its own ~221-day season between 28°F freezes, the 497 acres it covers and 199 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Haven's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Haven's own 28°F hard-freeze dates, about Mar 31 and Nov 7 and the ~221-day span between themNOAA 1991–2020 Climate Normals
- 199 documented contamination sites on the federal record near Haven, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Haven's boundary and the 497 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~221-day seasonGrowable Ground crop-matching engine
- The ecoregion at Haven's own centroid, the Central Great PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Haven's 497 acres read through its county's SSURGO summaryfrom Reno County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Reno 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 Reno County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Haven's 497 acreswhy one lot differs from the next →
- Which side of Haven you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 497 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Haven-wide figureread your own land →