Highland City, Florida, sits in USDA hardiness zone 10a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — okra, meyer lemon, california poppy, and artichoke — with any one site's soil, sun, and drainage making the final cut.
Even in Highland City, 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 Highland City 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 Highland City — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Highland City — the short answer
Highland City, Florida: USDA zone 10a, about 332 days between hard freezes, across 5K acres of town.
- USDA zone
- 10a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 22
- Polk County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 20
- Polk County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~332
- Polk County normal — NOAA 1991–2020, nearest to this town
- Town area
- 5K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. No 30-year normal resolves at this town’s own centroid, so the hard-freeze dates are Polk County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 10a is Highland City's average, not your lot's — a low corner or a tree line moves it. Against Highland City's 332-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Highland City
Each reading below is measured for Highland City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsHighland City runs about 332 days between hard freezes (read from Polk County, the closest normal to Highland City) — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredHighland City sits in USDA hardiness zone 10a.
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 Highland City is in
Highland City sits in the Southern Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Highland City's own centroid rather than borrowed from Polk County.
What Grows in Highland City
Every plant below cleared Highland City's own zone 10a and its 332-day season. Each card opens that plant's Florida profile. How we score.
Is it too late to plant in Highland City?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Jan 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Jan 22 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 20 — long-season crops need about 90 days of runway, quick greens only 30. With almost year-round growing weather, timing is about heat and rainfall more than frost — some bench is always in play.
What's on the federal record near Highland City
Closest first, within ~10 miles of Highland City. Listing isn't leaking, and distance isn't exposure.
- SPUR-HEBRONUnderground Storage Tanks · 150 ft
- HIGHLAND CITY FLNitrate · 400 ft
- CHEVRON STATIONUnderground Storage Tanks · 550 ft
- D. ROGERS AT HIGHLAND CITY FLNitrate · 950 ft
- FT MEADE CITY-WAREHOUSEUnderground Storage Tanks · 950 ft
- LAKELAND PACKING COUnderground Storage Tanks · 950 ft
- DIXIE #573Underground Storage Tanks · 950 ft
- VUONGS TIRESUnderground Storage Tanks · 950 ft
- RIGHTWAY FOODSUnderground Storage Tanks · 1500 ft
- CIRCLE K #0277Brownfields · 1700 ft
- CIRCLE K #0277Underground Storage Tanks · 1800 ft
- CUTLER MANUFACTURING CORPUnderground Storage Tanks · 2600 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Highland City'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 Highland City.
Total Sites
1,713
within ~10 miles of Highland City
Risk Level
Elevated
Highest-severity
19 Superfund sites
Sources Checked
within ~10 miles of Highland City
Severity Distribution
within ~10 miles of Highland City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Highland City, Toxics Release Inventory runs higher than the national average — 109 sites within ~10 miles of Highland City. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Highland City
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 Highland City average
Your land is one point inside Highland City
Everything above resolves to Highland City as a whole — one PHZM band, read across 5K acres, with hard-freeze dates borrowed from Polk County’s record because no 30-year normal resolves at this town’s own centroid. 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 Highland City Average
Highland City Average
- ●USDA Zones 10a, averaged across Highland City
- ●One soil character for all of Highland City
- ●Frost dates read at Highland City's scale: Jan 22 to Dec 20
YOUR Parcel
- ✓Your exact zone, not Highland City's 10a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Highland City
Pull a site-specific report for your exact address in Highland City, Florida — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Highland City averages can't show:
We read public map data around Highland City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Highland City average
How we know this about Highland City
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 Polk County’s record, because none resolves here; 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 Highland City
When does frost risk typically end in Highland City?
The last hard freeze (28°F) in Highland City typically lands around Jan 22, 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 Feb 12.
When is the first frost in Highland City?
The first hard freeze (28°F) in Highland City typically arrives around Dec 20, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Dec 6, so the watching starts about Nov 20 — about 332 days after the spring freeze cleared.
How long is the growing season in Highland City?
Measured between 28°F hard freezes, Highland City sees about 332 frost-free days — roughly Jan 22 through Dec 20, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 12 to Dec 6, about 297 days.
Is the soil safe to grow vegetables in Highland City?
The federal record around Highland City is a meaningful one — 1,713 documented sites, mostly Underground Storage Tanks entries (891), the nearest Underground Storage Tanks 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 Highland City?
From about Nov 20 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 Dec 20 (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 Dec 20. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Highland City's scale — its 10a band and its 332-day season. Your yard writes its own version of Highland City'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 Highland City’s own scale
5 of the readings below were taken at Highland City's own scale — the 5,046 acres it covers and 1,713 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Highland City's own USDA hardiness band, zones 10aUSDA PHZM 2023
- 1,713 documented contamination sites on the federal record near Highland City, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Highland City's boundary and the 5,046 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 10a and a ~332-day seasonGrowable Ground crop-matching engine
- The ecoregion at Highland City's own centroid, the Southern Coastal PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Highland City has no normal of its own, so its county's is the closest measured readfrom Polk County
- Soil character — no town-scale survey exists, so Highland City's 5,046 acres read through its county's SSURGO summaryfrom Polk County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Polk County
- The growing challenges every Florida grower plans around — written at state scale, so they stay on the state guidefrom Florida
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Polk County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Highland City's 5,046 acreswhy one lot differs from the next →
- Which side of Highland City you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 5,046 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Highland City-wide figureread your own land →
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