Towanda, Kansas, sits in USDA hardiness zone 7a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
A short list that earns its place here — cabbage, hazelnut, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Towanda, 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 Towanda 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 Towanda — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Towanda — the short answer
Towanda, Kansas: USDA zone 7a, about 224 days between hard freezes, across 586 acres of city.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~224
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 586 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 Towanda's average, not your lot's — a low corner or a tree line moves it. Against Towanda's 224-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Towanda
Each reading below is measured for Towanda itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredTowanda runs about 224 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
MeasuredTowanda 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 Towanda is in
Towanda sits in the Flint Hills — EPA Level III, inside the wider Great Plains. That is read at Towanda's own centroid rather than borrowed from Butler County.
What Grows in Towanda
Every plant below cleared Towanda's own zone 7a and its 224-day season. Each card opens that plant's Kansas profile. How we score.
Is it too late to plant in Towanda?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 2; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 30 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 9 — 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 Towanda
Closest first, within ~10 miles of Towanda. Listing isn't leaking, and distance isn't exposure.
- B & J EQUIPMENT SVC COBrownfields · 1400 ft
- DUSTROL, INC.Brownfields · 1400 ft
- USD 375 CIRCLE BUS BARNBrownfields · 1500 ft
- USD #375Underground Storage Tanks · 1700 ft
- COUNTRY STOREUnderground Storage Tanks · 2000 ft
- 7L FEED & WESTERN GIFTSUnderground Storage Tanks · 2300 ft
- TOWANDA AUTO SERVBrownfields · 0.6 mi
- COUNTRY STORE NO. 2, INCUnderground Storage Tanks · 0.6 mi
- TOWANDA PUBLISHING CO., INC.Brownfields · 0.6 mi
- W-W WELDINGBrownfields · 0.6 mi
- 26S 04E 09CAC 01Nitrate · 0.7 mi
- 26S 04E 16BBB 01Nitrate · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Towanda'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 Towanda.
Sources Checked
within ~10 miles of Towanda
Severity Distribution
within ~10 miles of Towanda
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Towanda, Nitrate runs higher than the national average — 390 sites within ~10 miles of Towanda. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Towanda
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 Towanda average
Your land is one point inside Towanda
Everything above resolves to Towanda as a whole — one PHZM band and one 28°F frost record, read across 586 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 Towanda Average
Towanda Average
- ●USDA Zones 7a, averaged across Towanda
- ●One soil character for all of Towanda
- ●Frost dates read at Towanda's scale: Mar 30 to Nov 9
YOUR Parcel
- ✓Your exact zone, not Towanda's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Towanda
Pull a site-specific report for your exact address in Towanda, Kansas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Towanda averages can't show:
We read public map data around Towanda — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Towanda average
How we know this about Towanda
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 Towanda’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 Towanda
When does frost risk typically end in Towanda?
The last hard freeze (28°F) in Towanda typically lands around Mar 30, 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 20.
When is the first frost in Towanda?
The first hard freeze (28°F) in Towanda typically arrives around Nov 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 26, so the watching starts about Oct 10 — about 224 days after the spring freeze cleared.
How long is the growing season in Towanda?
Measured between 28°F hard freezes, Towanda sees about 224 frost-free days — roughly Mar 30 through Nov 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 20 to Oct 26, about 189 days.
Is the soil safe to grow vegetables in Towanda?
The federal record around Towanda is a meaningful one — 612 documented sites, mostly Nitrate entries (390), the nearest Brownfields record about 0.3 miles 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 Towanda?
From about Oct 10 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Towanda's scale — its 7a band and its 224-day season. Your yard writes its own version of Towanda'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 Towanda’s own scale
6 of the readings below were taken at Towanda's own scale — its own ~224-day season between 28°F freezes, the 586 acres it covers and 612 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Towanda's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Towanda's own 28°F hard-freeze dates, about Mar 30 and Nov 9 and the ~224-day span between themNOAA 1991–2020 Climate Normals
- 612 documented contamination sites on the federal record near Towanda, the closest Brownfields record about 0.3 miles out from the town centreFederal environmental registers
- Towanda's boundary and the 586 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~224-day seasonGrowable Ground crop-matching engine
- The ecoregion at Towanda's own centroid, the Flint HillsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Towanda's 586 acres read through its county's SSURGO summaryfrom Butler County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Butler 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 Butler County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Towanda's 586 acreswhy one lot differs from the next →
- Which side of Towanda you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 586 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.3 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 Towanda-wide figureread your own land →
More in Kansas
Growing region