Port St. Lucie, 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 Port St. Lucie, 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 Port St. Lucie 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 Port St. Lucie — soil, climate, flood, and parcel records. How we handle your address.
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Port St. Lucie — the short answer
Port St. Lucie, Florida: USDA zone 10a, about 329 days between hard freezes, across 76K acres of city.
- USDA zone
- 10a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 19
- St. Lucie County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 14
- St. Lucie County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~329
- St. Lucie County normal — NOAA 1991–2020, nearest to this town
- City area
- 76K 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 St. Lucie County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 10a is Port St. Lucie's average, not your lot's — a low corner or a tree line moves it. Against Port St. Lucie's 329-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Port St. Lucie
Each reading below is measured for Port St. Lucie itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsPort St. Lucie runs about 329 days between hard freezes (read from St. Lucie County, the closest normal to Port St. Lucie) — 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
MeasuredPort St. Lucie 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 Port St. Lucie is in
Port St. Lucie sits in the Southern Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Port St. Lucie's own centroid rather than borrowed from St. Lucie County.
What Grows in Port St. Lucie
Every plant below cleared Port St. Lucie's own zone 10a and its 329-day season. Each card opens that plant's Florida profile. How we score.
Is it too late to plant in Port St. Lucie?
Usually not — gardeners here simply switch what goes in the ground as the season moves. 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 19 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 14 — 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 Port St. Lucie
Closest first, within ~10 miles of Port St. Lucie. Listing isn't leaking, and distance isn't exposure.
- SUNLIGHT FOOD MART# 5Underground Storage Tanks · 0.6 mi
- CUMBERLAND FARMS #1094Underground Storage Tanks · 0.9 mi
- CUMBERLAND FARMS #1094Brownfields · 0.9 mi
- SOFLSUS2-19 ST. LUCIE CO 75' WELLNitrate · 1.3 mi
- BIOWASTE LLCBrownfields · 1.3 mi
- SAM'S CLUB #4972Brownfields · 1.3 mi
- SAMS CLUB #4972Underground Storage Tanks · 1.4 mi
- HOME DEPOT #6376Brownfields · 1.5 mi
- WAL-MART SUPERCENTER #4260Brownfields · 1.5 mi
- EXPERT SHUTTER SERVICEBrownfields · 1.5 mi
- C & L AUTO BODYBrownfields · 1.5 mi
- PHIL'S JETSKI REPAIRBrownfields · 1.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Port St. Lucie'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 Port St. Lucie.
Total Sites
620
within ~10 miles of Port St. Lucie
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Port St. Lucie
Severity Distribution
within ~10 miles of Port St. Lucie
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Port St. Lucie
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 Port St. Lucie average
Your land is one point inside Port St. Lucie
Everything above resolves to Port St. Lucie as a whole — one PHZM band, read across 76K acres, with hard-freeze dates borrowed from St. Lucie County’s record because no 30-year normal resolves at this city’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 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 Port St. Lucie Average
Port St. Lucie Average
- ●USDA Zones 10a, averaged across Port St. Lucie
- ●One soil character for all of Port St. Lucie
- ●Frost dates read at Port St. Lucie's scale: Jan 19 to Dec 14
YOUR Parcel
- ✓Your exact zone, not Port St. Lucie's 10a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Port St. Lucie
Pull a site-specific report for your exact address in Port St. Lucie, Florida — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Port St. Lucie averages can't show:
We read public map data around Port St. Lucie — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Port St. Lucie average
How we know this about Port St. Lucie
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 St. Lucie 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 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 Port St. Lucie
When does frost risk typically end in Port St. Lucie?
The last hard freeze (28°F) in Port St. Lucie typically lands around Jan 19, 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 9.
When is the first frost in Port St. Lucie?
The first hard freeze (28°F) in Port St. Lucie typically arrives around Dec 14, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 30, so the watching starts about Nov 14 — about 329 days after the spring freeze cleared.
How long is the growing season in Port St. Lucie?
Measured between 28°F hard freezes, Port St. Lucie sees about 329 frost-free days — roughly Jan 19 through Dec 14, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 9 to Nov 30, about 294 days.
Is the soil safe to grow vegetables in Port St. Lucie?
The federal record around Port St. Lucie is a meaningful one — 620 documented sites, mostly Underground Storage Tanks entries (290), the nearest Underground Storage Tanks record about 0.6 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 Port St. Lucie?
From about Nov 14 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 14 (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 14. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Port St. Lucie's scale — its 10a band and its 329-day season. Your yard writes its own version of Port St. Lucie'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 Port St. Lucie’s own scale
5 of the readings below were taken at Port St. Lucie's own scale — the 76,298 acres it covers and 620 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Port St. Lucie's own USDA hardiness band, zones 10aUSDA PHZM 2023
- 620 documented contamination sites on the federal record near Port St. Lucie, the closest Underground Storage Tanks record about 0.6 miles out from the town centreFederal environmental registers
- Port St. Lucie's boundary and the 76,298 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 10a and a ~329-day seasonGrowable Ground crop-matching engine
- The ecoregion at Port St. Lucie's own centroid, the Southern Coastal PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Port St. Lucie has no normal of its own, so its county's is the closest measured readfrom St. Lucie County
- Soil character — no town-scale survey exists, so Port St. Lucie's 76,298 acres read through its county's SSURGO summaryfrom St. Lucie County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom St. Lucie 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 St. Lucie County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Port St. Lucie's 76,298 acreswhy one lot differs from the next →
- Which side of Port St. Lucie you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 76,298 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.6 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 Port St. Lucie-wide figureread your own land →