Holt County, in Nebraska, sits in USDA hardiness zone 5a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
These conditions suit sweet corn, tomato, cottonwood, and sunflower — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Holt County lies within the Nebraska Sandhills — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Holt County holds more than one microclimate.
Soils and elevations shift across Holt County, so your frost dates and drainage aren't the county average. Enter your address and we'll score 1,112 plants against your land's actual soil, sun, and frost.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Quick Facts
USDA Zones
5a
Last Hard Freeze (28°F)
Apr 8
County normal — light frosts run a few weeks later
First Hard Freeze (28°F)
Oct 27
County normal — light frosts arrive a few weeks earlier
County Area
1.5M acres
Hardiness Zone Range
Zone maps are averages across Holt County. Your yard's slope, trees, and frost pockets shift what actually grows — see your land's exact reading.
Soil in Holt County
Across Holt County, the ground is predominantly Entisols, where Valentine, Els, and Ipage are the most extensive named soil series. The soil is generally excessively drained with a fine sand surface. Topsoil pH runs about 6.5–6.7, neutral. Rainfall drains through hydrologic group A soils.
Soil order
Entisols
Drainage
Excessively drained
Prime farmland
5%
Hydric soils
8%
Soil still varies lot by lot — soil types explained.
What Grows in Holt County
Plants matched to Holt County's USDA zones 5a — each links to its full growing profile.
Is it too late to plant in Holt County?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 27 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Growing Challenges in Nebraska
What an experienced grower plans around here — each one has a move.
Low western rainfall (15 inches) requires irrigation
In the west, drip lines and deep mulch are the season — design the water first and the garden follows.
Extreme wind exposure on open plains
A windbreak earns its ground: even a shrub row or a snow fence cuts plant stress dramatically.
Hail damage during severe storm season
Keep row cover or hail netting staged through the storm months — five minutes of cover can save the whole bed.
For cultivar selection, pest pressure, and planting-time guidance specific to Nebraska, the Nebraska Extension is the authoritative local source.
Safe to Grow Here?
What the federal record shows across Holt County — and how to grow with it.
We checked the federal record across Holt County — 214 documented sites across 7 of the 9 source types we track.
The most significant on record: 1 Superfund site. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
There's a meaningful federal record across Holt County — worth a look before you plant food, not a reason to hold back from growing. Proximity to a documented site is information, not a diagnosis of any one yard. A soil test before new food beds is the sensible precaution here, and the map shows exactly which sites sit where, so you can see what's actually near you.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Environmental Intelligence
Understanding what's nearby helps you make informed decisions about where and how to grow.
Severity Distribution
across Holt County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Holt County, two things run higher than the national average — CAFO (14 sites) and Nitrate (150 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
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 Holt County
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,112 plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Your Specific Parcel Matters
Holt County Average
- ●USDA Zones 5a
- ●Generic soil type for the area
- ●State-average frost dates
YOUR Parcel
- ✓Your exact hardiness zone
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Holt County
Pull a site-specific report for your exact address in Holt County, Nebraska — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Key Growing Facts for Holt County, Nebraska
- USDA Hardiness Zones: 5a (USDA PHZM 2023)
- Last Hard Freeze (28°F): Apr 8 (county normal, NOAA 1991–2020 Climate Normals — light frosts can follow for a few weeks)
- First Hard Freeze (28°F): Oct 27 (county normal, NOAA 1991–2020 Climate Normals — light frosts can arrive a few weeks earlier)
- Days Between Hard Freezes: ~202 (county normal, NOAA 1991–2020 Climate Normals)
- County Land Area: 1.5M acres (US Census TIGER 2025)
Zone data: USDA ARS Plant Hardiness Zone Map 2023. Climate data: NOAA NCEI. County boundaries: US Census TIGER/Line 2025.
Frost dates here are the Holt County average. Low spots and tree cover move them by days on any one yard — see your exact frost windows.
Frequently Asked Questions
What hardiness zone is Holt County, Nebraska?
Holt County sits in USDA hardiness zone 5a, per the USDA Plant Hardiness Zone Map 2023. Zones reflect average annual extreme minimum temperatures from 1991–2020 weather data.
Is it too late to plant in Holt County?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 27 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
When does frost risk typically end in Holt County?
The last hard freeze (28°F) in Holt County typically lands around Apr 8, per NOAA 1991–2020 climate normals — an earlier marker than the light-frost dates many planting charts quote. That marks the hard freeze, not the last light frost — light frosts can still bite for a few more weeks, so tender transplants usually wait another 2–3 weeks.
How long is the growing season in Holt County?
Measured between 28°F hard freezes, Holt County sees about 202 frost-free days — roughly Apr 8 through Oct 27, per NOAA 1991–2020 climate normals. Tender crops get a somewhat shorter practical window, since lighter frosts reach a few weeks past the hard-freeze dates on both ends.
What vegetables grow in Holt County?
Holt County's zone 5a supports a wide range — strong performers include Sweet Corn, Tomato, Cottonwood, and Sunflower. What actually takes on any one site comes down to its soil, sun, and drainage, and we score each plant against the real conditions at your address.
Which hardiness zone is Holt County, really?
Officially, Holt County sits in USDA zone 5a (USDA PHZM 2023) — but a zone is a 30-year average of winter's coldest night across an area, and it can't see any one yard. A south-facing slope, a tree line, or a low frost pocket can shift a single site by half a zone either way, which is why neighboring gardeners often quote different numbers. We read the conditions at your exact address — soil, sun, slope, and frost — and score 1,112 plants against what's actually there.
Is the soil safe to grow vegetables in Holt County?
The federal record around Holt County is a meaningful one — 214 documented sites — 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.
Just moved to Holt County — what should I know before planting?
Start with three facts. Holt County sits in USDA zone 5a, which sets what survives winter; the last 28°F hard freeze typically clears around Apr 8, with about 202 frost-free days to work with (NOAA 1991–2020 climate normals); and 214 documented sites sit on the federal record here, so a soil test before food beds is the smart first step. From there, matching plants to your actual soil and sun is the fun part.
Everything on this page is a Holt County average. Your yard writes its own version — we read soil, sun, drainage, and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Nebraska's frost window, season length, and soil profile against the plant's real requirements.