Oldsmar, Florida, sits in USDA hardiness zone 10a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Reliable performers under these conditions include artichoke, meyer lemon, california poppy, and cabbage; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Oldsmar, 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 Oldsmar 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 Oldsmar — soil, climate, flood, and parcel records. How we handle your address.
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Oldsmar — the short answer
Oldsmar, Florida: USDA zone 10a, no 28°F killing freeze on record — the season is year-round, across 6K acres of city.
- USDA zone
- 10a
- USDA PHZM 2023
- Killing freeze
- None on record
- NOAA RCC ACIS 1991–2020, this town’s own record
- City area
- 6K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. The year-round finding is measured — a 30-year record with no 28°F killing freeze in it — never inferred from missing dates.
Hardiness Zone Range
Zone 10a is Oldsmar's average, not your lot's — a low corner or a tree line moves it. Against Oldsmar's no killing freeze on record, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Oldsmar
Each reading below is measured for Oldsmar itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Winter hardiness
MeasuredOldsmar 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 Oldsmar is in
Oldsmar sits in the Southern Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Oldsmar's own centroid rather than borrowed from Pinellas County.
What Grows in Oldsmar
Every plant below cleared Oldsmar's own zone 10a. Each card opens that plant's Florida profile. How we score.
What's on the federal record near Oldsmar
Closest first, within ~10 miles of Oldsmar. Listing isn't leaking, and distance isn't exposure.
- BMG OLDSMAR FAMILY MEDICINEBrownfields · 1500 ft
- TOWN OF OLDSMAR WELL NEAR OLDSMAR FLNitrate · 1500 ft
- Oldsmar WaterPFAS · 1700 ft
- WAL-MART SUPERCENTER #2796Brownfields · 2000 ft
- 7-ELEVEN FOOD STORE #32206Underground Storage Tanks · 2300 ft
- BELAC LLCBrownfields · 2500 ft
- TOWER IMAGING DBA TGH IMAGINGBrownfields · 2500 ft
- SYNERGY HEALTH AST LLCToxics Release Inventory · 2600 ft
- CVS PHARMACY #3579Brownfields · 2600 ft
- THORNTONS INCUnderground Storage Tanks · 0.5 mi
- CREATIVE BODY WORKSBrownfields · 0.5 mi
- WALGREENS STORE #4480Brownfields · 0.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Oldsmar'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 Oldsmar.
Sources Checked
within ~10 miles of Oldsmar
Severity Distribution
within ~10 miles of Oldsmar
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Oldsmar, Nitrate runs higher than the national average — 558 sites within ~10 miles of Oldsmar. 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 Oldsmar
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 Oldsmar average
Your land is one point inside Oldsmar
Everything above resolves to Oldsmar as a whole — one PHZM band and one 28°F frost record, read across 6K 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 Oldsmar Average
Oldsmar Average
- ●USDA Zones 10a, averaged across Oldsmar
- ●One soil character for all of Oldsmar
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Oldsmar's 10a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Oldsmar
Pull a site-specific report for your exact address in Oldsmar, Florida — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Oldsmar averages can't show:
We read public map data around Oldsmar — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Oldsmar average
How we know this about Oldsmar
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, with the labelled statewide window where none resolves; 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 Oldsmar
Is it too late to plant in Oldsmar?
No — Oldsmar has no 28°F killing freeze in the 30-year station record, so the growing season is year-round and there is no last-frost date to wait for. Planting is paced by rainfall, heat and daylength instead of by frost: start heat-lovers any month, and time cool-season crops (lettuce, brassicas, peas) for the cooler, wetter half of the year or for higher ground. Succession sowing every few weeks works all year, so the limit is what you can keep watered and harvested, not the calendar.
When does frost risk typically end in Oldsmar?
It doesn't — Oldsmar records no 28°F killing freeze at all across the 1991–2020 station record, so there is no spring frost date to plant after. Cold still matters with elevation: the higher you garden, the cooler the nights, and a few tropical crops sulk below about 60°F even where they never freeze.
How long is the growing season in Oldsmar?
Year-round — the 1991–2020 station record for Oldsmar contains no 28°F killing freeze, so there is no season to measure between freezes. What paces planting instead is heat, rainfall and daylength: the hottest, wettest stretch is the hard part for cool-season crops, not winter. Elevation is the one real exception — the higher you garden, the colder the nights get.
Is the soil safe to grow vegetables in Oldsmar?
The federal record around Oldsmar is a meaningful one — 2,038 documented sites, mostly Underground Storage Tanks entries (850), 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.
Everything above is measured at Oldsmar's scale — its 10a band and its no killing freeze on record. Your yard writes its own version of Oldsmar'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 Oldsmar’s own scale
6 of the readings below were taken at Oldsmar's own scale — the 5,725 acres it covers and 2,038 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Oldsmar's own USDA hardiness band, zones 10aUSDA PHZM 2023
- No 28°F killing freeze in the 30-year station record covering Oldsmar — a year-round growing seasonNOAA Regional Climate Centers ACIS, 1991-2020
- 2,038 documented contamination sites on the federal record near Oldsmar, the closest Brownfields record about 0.3 miles out from the town centreFederal environmental registers
- Oldsmar's boundary and the 5,725 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear Oldsmar's hardiness zoneGrowable Ground crop-matching engine
- The ecoregion at Oldsmar's own centroid, the Southern Coastal PlainUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Oldsmar's 5,725 acres read through its county's SSURGO summaryfrom Pinellas County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Pinellas 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 Pinellas County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Oldsmar's 5,725 acreswhy one lot differs from the next →
- Which side of Oldsmar you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 5,725 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 Oldsmar-wide figureread your own land →
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