Watertown, Florida, sits in USDA hardiness zone 9a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
The conditions favor artichoke, fig, california poppy, and cabbage, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Watertown, 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 Watertown 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 Watertown — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Watertown — the short answer
Watertown, Florida: USDA zone 9a, about 308 days between hard freezes, across 2K acres of town.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 4
- Columbia County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 9
- Columbia County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~308
- Columbia County normal — NOAA 1991–2020, nearest to this town
- Town area
- 2K 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 Columbia County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Watertown's average, not your lot's — a low corner or a tree line moves it. Against Watertown's 308-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Watertown
Each reading below is measured for Watertown itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsWatertown runs about 308 days between hard freezes (read from Columbia County, the closest normal to Watertown) — 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
MeasuredWatertown sits in USDA hardiness zone 9a.
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 Watertown is in
Watertown sits in the Southeastern Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Watertown's own centroid, and it is not what its county reads: Columbia County is mostly Southern Coastal Plain. The wider page above you is answering a different question about different ground.
What Grows in Watertown
Every plant below cleared Watertown's own zone 9a and its 308-day season. Each card opens that plant's Florida profile. How we score.
Is it too late to plant in Watertown?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Jan 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 9 — 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 Watertown
Closest first, within ~10 miles of Watertown. Listing isn't leaking, and distance isn't exposure.
- SPIRES FOOD STORE-IGA ESPRESSUnderground Storage Tanks · 550 ft
- AMOCO-EAST ENDUnderground Storage Tanks · 800 ft
- STOP N GO #6Underground Storage Tanks · 1000 ft
- S&S #314Underground Storage Tanks · 1100 ft
- OMI OF LAKE CITY, LLCUnderground Storage Tanks · 1700 ft
- UNITED PARCEL SRVC-DIST CTRUnderground Storage Tanks · 2200 ft
- WISHES AUTO SHOP REPAIR INCBrownfields · 2200 ft
- FLORIDA ACS FORESTRY CENTRAL SHOPBrownfields · 2500 ft
- HOPKINS MOTOR CO INCBrownfields · 2600 ft
- TIRE MART OF LAKE CITY INCBrownfields · 2600 ft
- CHEVRON-G W HUNTER #90-EUnderground Storage Tanks · 2600 ft
- S&S #304Underground Storage Tanks · 0.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Watertown'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 Watertown.
Total Sites
340
within ~10 miles of Watertown
Risk Level
Elevated
Highest-severity
8 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Watertown
Severity Distribution
within ~10 miles of Watertown
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Watertown, Superfund runs higher than the national average — 8 sites within ~10 miles of Watertown. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Watertown
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 Watertown average
Your land is one point inside Watertown
Everything above resolves to Watertown as a whole — one PHZM band, read across 2K acres, with hard-freeze dates borrowed from Columbia 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 Watertown Average
Watertown Average
- ●USDA Zones 9a, averaged across Watertown
- ●One soil character for all of Watertown
- ●Frost dates read at Watertown's scale: Feb 4 to Dec 9
YOUR Parcel
- ✓Your exact zone, not Watertown's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Watertown
Pull a site-specific report for your exact address in Watertown, Florida — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Watertown averages can't show:
We read public map data around Watertown — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Watertown average
How we know this about Watertown
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 Columbia 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 Watertown
When does frost risk typically end in Watertown?
The last hard freeze (28°F) in Watertown typically lands around Feb 4, 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 25.
When is the first frost in Watertown?
The first hard freeze (28°F) in Watertown typically arrives around Dec 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 25, so the watching starts about Nov 9 — about 308 days after the spring freeze cleared.
How long is the growing season in Watertown?
Measured between 28°F hard freezes, Watertown sees about 308 frost-free days — roughly Feb 4 through Dec 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 25 to Nov 25, about 273 days.
Is the soil safe to grow vegetables in Watertown?
The federal record around Watertown is a meaningful one — 340 documented sites, mostly Underground Storage Tanks entries (206), the nearest Underground Storage Tanks record about 0.1 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 Watertown?
From about Nov 9 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Watertown's scale — its 9a band and its 308-day season. Your yard writes its own version of Watertown'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 Watertown’s own scale
5 of the readings below were taken at Watertown's own scale — the 1,583 acres it covers and 340 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Watertown's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 340 documented contamination sites on the federal record near Watertown, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Watertown's boundary and the 1,583 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~308-day seasonGrowable Ground crop-matching engine
- Watertown sits in the Southeastern Plains — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Watertown has no normal of its own, so its county's is the closest measured readfrom Columbia County
- Soil character — no town-scale survey exists, so Watertown's 1,583 acres read through its county's SSURGO summaryfrom Columbia County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Columbia 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 Columbia County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Watertown's 1,583 acreswhy one lot differs from the next →
- Which side of Watertown you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,583 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Watertown-wide figureread your own land →
More in Florida
Wider growing context
What grows across FloridaWatertown sits outside our named growing regions, so Florida as a whole is its closest context here.
Nearby growing guides