Jupiter Island, Florida, sits in USDA hardiness zone 10b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Well-matched crops include mango, tomato, orange, and sweet potato, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Jupiter Island, 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 Jupiter Island 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 Jupiter Island — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Jupiter Island — the short answer
Jupiter Island, Florida: USDA zone 10b, about 330 days between hard freezes, across 2K acres of town.
- USDA zone
- 10b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 19
- Martin County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 15
- Martin County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~330
- Martin 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 Martin County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 10b is Jupiter Island's average, not your lot's — a low corner or a tree line moves it. Against Jupiter Island's 330-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Jupiter Island
Each reading below is measured for Jupiter Island itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsJupiter Island runs about 330 days between hard freezes (read from Martin County, the closest normal to Jupiter Island) — 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
MeasuredJupiter Island sits in USDA hardiness zone 10b.
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 Jupiter Island is in
Jupiter Island sits in the Southern Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Jupiter Island's own centroid rather than borrowed from Martin County.
What Grows in Jupiter Island
Plants matched to Jupiter Island's USDA zones 10b, ordered by how much hardiness margin each has here — the ones with room to spare at both ends of this town's band lead. Each links to its full growing profile.
Is it too late to plant in Jupiter Island?
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 15 — 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 Jupiter Island
Closest first, within ~10 miles of Jupiter Island. Listing isn't leaking, and distance isn't exposure.
- STATE PARK-JONATHAN DICKINSONUnderground Storage Tanks · 0.7 mi
- M -1073Nitrate · 1.0 mi
- JUPITER ISLAND POLICE & FIRE DEPTUnderground Storage Tanks · 1.8 mi
- M -1072Nitrate · 1.8 mi
- M -1071Nitrate · 1.8 mi
- HOBE SOUND COBrownfields · 1.8 mi
- S - 488Nitrate · 1.9 mi
- S - 486Nitrate · 1.9 mi
- M-12,13,14Nitrate · 2.1 mi
- SOUTH MARTIN REGIONAL UTIL-SOUTH WTPUnderground Storage Tanks · 2.2 mi
- SOUTH MARTIN REGIONAL UTILITY SOUTH WTPBrownfields · 2.2 mi
- MARTIN WELL NO. F1 AAH8062Nitrate · 2.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Jupiter Island'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 Jupiter Island.
Sources Checked
within ~10 miles of Jupiter Island
Severity Distribution
within ~10 miles of Jupiter Island
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Jupiter Island, Nitrate runs higher than the national average — 104 sites within ~10 miles of Jupiter Island. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Jupiter Island
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 Jupiter Island average
Your land is one point inside Jupiter Island
Everything above resolves to Jupiter Island as a whole — one PHZM band, read across 2K acres, with hard-freeze dates borrowed from Martin 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 Jupiter Island Average
Jupiter Island Average
- ●USDA Zones 10b, averaged across Jupiter Island
- ●One soil character for all of Jupiter Island
- ●Frost dates read at Jupiter Island's scale: Jan 19 to Dec 15
YOUR Parcel
- ✓Your exact zone, not Jupiter Island's 10b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Jupiter Island
Pull a site-specific report for your exact address in Jupiter Island, Florida — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Jupiter Island averages can't show:
We read public map data around Jupiter Island — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Jupiter Island average
How we know this about Jupiter Island
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 Martin 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 Jupiter Island
When does frost risk typically end in Jupiter Island?
The last hard freeze (28°F) in Jupiter Island 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 Jupiter Island?
The first hard freeze (28°F) in Jupiter Island typically arrives around Dec 15, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Dec 1, so the watching starts about Nov 15 — about 330 days after the spring freeze cleared.
How long is the growing season in Jupiter Island?
Measured between 28°F hard freezes, Jupiter Island sees about 330 frost-free days — roughly Jan 19 through Dec 15, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 9 to Dec 1, about 295 days.
Is the soil safe to grow vegetables in Jupiter Island?
The federal record around Jupiter Island is a meaningful one — 393 documented sites, mostly Underground Storage Tanks entries (150), the nearest Underground Storage Tanks record about 0.7 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 Jupiter Island?
From about Nov 15 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 15 (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 15. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Jupiter Island's scale — its 10b band and its 330-day season. Your yard writes its own version of Jupiter Island'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 Jupiter Island’s own scale
4 of the readings below were taken at Jupiter Island's own scale — the 1,734 acres it covers and 393 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Jupiter Island's own USDA hardiness band, zones 10bUSDA PHZM 2023
- 393 documented contamination sites on the federal record near Jupiter Island, the closest Underground Storage Tanks record about 0.7 miles out from the town centreFederal environmental registers
- Jupiter Island's boundary and the 1,734 acres inside itUS Census TIGER/Line 2025
- The ecoregion at Jupiter Island's own centroid, the Southern Coastal PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Jupiter Island has no normal of its own, so its county's is the closest measured readfrom Martin County
- Soil character — no town-scale survey exists, so Jupiter Island's 1,734 acres read through its county's SSURGO summaryfrom Martin County
- The candidate plant list — Florida's curated set, filtered to this zone band and re-ordered by how much margin each has herefrom Florida
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Martin 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 Martin County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Jupiter Island's 1,734 acreswhy one lot differs from the next →
- Which side of Jupiter Island you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,734 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.7 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 Jupiter Island-wide figureread your own land →