Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 34991 — Palm City, FL

ZIP code 34991 (Palm City, Martin County) is in USDA zone 10b: the coldest winter night averages 35 to 40 °F.

Where ZIP 34991 is

tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone10b35 to 40 °F
Coldest night1.7 to 4.4 °C
Last frostrare
First frostrare
2012 zone10a

Was 10a on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 10b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Palm City, FL…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates

A 32 °F frost doesn't happen here in most winters. At the nearest station (NOAA station Stuart, FL — 2 miles away, elevation 13 ft) the median growing season is 365 days. When frost does come, it is a midwinter night or two; cover tender plants when a freeze is forecast.

Frost data: NOAA NCEI U.S. Climate Normals 1991–2020.

When spring arrived in 2026

In 2026, spring leaf-out near 34991 came on Jan 11 — about the same time as the 1991–2020 average (Jan 13).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Native plants for zone 10b in Florida

497 plants native to the lower 48 states, recorded in Florida, and rated by the USDA to survive 35 °F or colder — the bottom of zone 10b. Each links to its USDA PLANTS profile.

Trees 70

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °FAtlantic white cedar50 ft · blooms spring · medium shade tolerance · to −36 °F

Shrubs 118

aloe yucca15 ft · blooms early summer · medium shade tolerance · to −1 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °F

Wildflowers & perennials 154

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican century plant6 ft · blooms indeterminate · high shade tolerance · to 12 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican spongeplant0.5 ft · blooms mid spring · high shade tolerance · to −24 °F

Grasses 135

American cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Fannual wildrice10 ft · blooms indeterminate · high shade tolerance · to 32 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbeaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °F

Vines 12

American wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fcupseed30 ft · blooms late spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Fgraybark grape50 ft · blooms late spring · medium shade tolerance · to −8 °F

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Palm City, FL.

Soil in Palm City, FL

The soil mapped at the center of ZIP 34991 is Hobe — fine sand, somewhat excessively drained.

TextureFine sanddrains and warms fast; dries out and needs more feeding
pH5.1strongly acidic; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Hobe fine sand, 0 to 5 percent slopes.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 34991; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Palm City, FL

Summer high91 °Faverage high, July
Winter low56 °Faverage low, January
Hot days81days a year at 90 °F or more
Freezing nights0nights a year at 32 °F or less
Growing degree days9,270base 50 °F — the season’s usable heat
Longest day13 h 51 mindaylight on June 21
Shortest day10 h 26 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation62.7 inper year, rain and melted snow

Average high and low, by month

50°60°70°80°90°100°January: average high 74 °F, low 56 °F 74°56° JanFebruary: average high 76 °F, low 59 °F 76°59° FebMarch: average high 78 °F, low 61 °F 78°61° MarApril: average high 82 °F, low 67 °F 82°67° AprMay: average high 86 °F, low 71 °F 86°71° MayJune: average high 89 °F, low 74 °F 89°74° JunJuly: average high 91 °F, low 76 °F 91°76° JulAugust: average high 91 °F, low 76 °F 91°76° AugSeptember: average high 89 °F, low 75 °F 89°75° SepOctober: average high 85 °F, low 72 °F 85°72° OctNovember: average high 80 °F, low 65 °F 80°65° NovDecember: average high 76 °F, low 60 °F 76°60° Dec

Precipitation by month inches

0″2″4″6″8″January: 3.01 in precipitation 3.0 JanFebruary: 2.61 in precipitation 2.6 FebMarch: 3.76 in precipitation 3.8 MarApril: 3.56 in precipitation 3.6 AprMay: 5.66 in precipitation 5.7 MayJune: 7.44 in precipitation 7.4 JunJuly: 6.08 in precipitation 6.1 JulAugust: 8.49 in precipitation 8.5 AugSeptember: 8.28 in precipitation 8.3 SepOctober: 6.46 in precipitation 6.5 OctNovember: 4.16 in precipitation 4.2 NovDecember: 3.21 in precipitation 3.2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Stuart, FL (2 mi away); precipitation: Stuart, FL (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

2 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

3499510b
Stuart, FL · 2 mi
3499410b
Stuart, FL · 2 mi
3499210b
Port Salerno, FL · 4 mi
3499610b
Stuart, FL · 5 mi
3495810b
Jensen Beach, FL · 6 mi
3499010a
Palm City, FL · 6 mi
3498410a
Port Saint Lucie, FL · 7 mi
3495710b
Jensen Beach, FL · 8 mi

All 2 ZIP codes in Palm City → · Florida planting zones →

Questions about 34991

What planting zone is ZIP code 34991?

ZIP code 34991 (Palm City, FL) is in USDA hardiness zone 10b on the 2023 map: the coldest night of an average winter reaches 35 to 40 °F (1.7 to 4.4 °C).

How much rain and snow does 34991 get?

About 62.7 inches of precipitation a year (NOAA 1991–2020 normals, Stuart station).

How hot do summers get in Palm City, FL?

The average high peaks at 91 °F in July, with about 81 days a year at 90 °F or more.

What kind of soil does 34991 have?

The USDA soil survey maps Hobe at the center of ZIP 34991: fine sand, somewhat excessively drained, pH about 5.1 (strongly acidic).

Did spring come early in Palm City, FL in 2026?

Spring leaf-out near 34991 came on Jan 11 in 2026, about the same as the 1991–2020 average (Jan 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Palm City, FL?

Short-day onions: the longest day near 34991 is 13 h 51 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 34991 change?

Yes. The 2012 USDA map put 34991 in zone 10a; the 2023 map puts it in zone 10b. The newer map uses 1991–2020 data and more weather stations.