Trinity, Florida, sits in USDA hardiness zone 9b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
These conditions suit okra, meyer lemon, california poppy, and artichoke — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Trinity, 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 Trinity 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 Trinity — soil, climate, flood, and parcel records. How we handle your address.
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Trinity — the short answer
Trinity, Florida: USDA zone 9b, about 325 days between hard freezes, across 4K acres of town.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 27
- Pasco County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 18
- Pasco County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~325
- Pasco County normal — NOAA 1991–2020, nearest to this town
- Town area
- 4K 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 Pasco County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Trinity's average, not your lot's — a low corner or a tree line moves it. Against Trinity's 325-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Trinity
Each reading below is measured for Trinity itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsTrinity runs about 325 days between hard freezes (read from Pasco County, the closest normal to Trinity) — 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
MeasuredTrinity sits in USDA hardiness zone 9b.
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 Trinity is in
Trinity sits in the Southern Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Trinity's own centroid rather than borrowed from Pasco County.
What Grows in Trinity
Every plant below cleared Trinity's own zone 9b and its 325-day season. Each card opens that plant's Florida profile. How we score.
Is it too late to plant in Trinity?
For most of the year, no — what changes is which crops still fit the days remaining. 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 27 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 18 — long-season crops need about 90 days of runway, quick greens only 30. And with a calendar this mild, the honest answer is that planting barely stops — winter opens seasons colder regions never see.
What's on the federal record near Trinity
Closest first, within ~10 miles of Trinity. Listing isn't leaking, and distance isn't exposure.
- ELDRIDGE-WILDE PRODUCTION 101 NR TARPON SPRINGS FLNitrate · 0.9 mi
- 7-ELEVEN STORE #38110Underground Storage Tanks · 1.0 mi
- O'REILLY AUTO PARTS #6400Brownfields · 1.0 mi
- PEDIATRIC ASSOCIATES TRINITYBrownfields · 1.1 mi
- CVS PHARMACY #3703Brownfields · 1.1 mi
- CIRCLE K #2709830Underground Storage Tanks · 1.2 mi
- WALGREENS STORE #6752Brownfields · 1.3 mi
- TAMPA BAY EXECUTIVE AIRPORTUnderground Storage Tanks · 1.3 mi
- MITCHELL RANCH INTERNAL MEDICINEBrownfields · 1.3 mi
- TOWER IMAGING DBA TGH IMAGINGBrownfields · 1.3 mi
- MOBIL STATIONUnderground Storage Tanks · 1.4 mi
- JIM MITCHELL RANCHUnderground Storage Tanks · 1.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Trinity'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 Trinity.
Sources Checked
within ~10 miles of Trinity
Severity Distribution
within ~10 miles of Trinity
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Trinity, Nitrate runs higher than the national average — 526 sites within ~10 miles of Trinity. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Trinity
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 Trinity average
Your land is one point inside Trinity
Everything above resolves to Trinity as a whole — one PHZM band, read across 4K acres, with hard-freeze dates borrowed from Pasco 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 Trinity Average
Trinity Average
- ●USDA Zones 9b, averaged across Trinity
- ●One soil character for all of Trinity
- ●Frost dates read at Trinity's scale: Jan 27 to Dec 18
YOUR Parcel
- ✓Your exact zone, not Trinity's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Trinity
Pull a site-specific report for your exact address in Trinity, Florida — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Trinity averages can't show:
We read public map data around Trinity — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Trinity average
How we know this about Trinity
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 Pasco 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 Trinity
When does frost risk typically end in Trinity?
The last hard freeze (28°F) in Trinity typically lands around Jan 27, 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 17.
When is the first frost in Trinity?
The first hard freeze (28°F) in Trinity typically arrives around Dec 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Dec 4, so the watching starts about Nov 18 — about 325 days after the spring freeze cleared.
How long is the growing season in Trinity?
Measured between 28°F hard freezes, Trinity sees about 325 frost-free days — roughly Jan 27 through Dec 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 17 to Dec 4, about 290 days.
Is the soil safe to grow vegetables in Trinity?
The federal record around Trinity is a meaningful one — 1,378 documented sites, mostly Nitrate entries (526), the nearest Nitrate record about 0.9 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 Trinity?
From about Nov 18 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 18 (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 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Trinity's scale — its 9b band and its 325-day season. Your yard writes its own version of Trinity'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 Trinity’s own scale
5 of the readings below were taken at Trinity's own scale — the 3,959 acres it covers and 1,378 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Trinity's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 1,378 documented contamination sites on the federal record near Trinity, the closest Nitrate record about 0.9 miles out from the town centreFederal environmental registers
- Trinity's boundary and the 3,959 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~325-day seasonGrowable Ground crop-matching engine
- The ecoregion at Trinity's own centroid, the Southern Coastal PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Trinity has no normal of its own, so its county's is the closest measured readfrom Pasco County
- Soil character — no town-scale survey exists, so Trinity's 3,959 acres read through its county's SSURGO summaryfrom Pasco County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Pasco 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 Pasco County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Trinity's 3,959 acreswhy one lot differs from the next →
- Which side of Trinity you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,959 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.9 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 Trinity-wide figureread your own land →
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