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

Planting zone for 34986 — Port Saint Lucie, FL

ZIP code 34986 (Port Saint Lucie, St. Lucie County) is in USDA zone 10a: the coldest winter night averages 30 to 35 °F.

Where ZIP 34986 is

Outlined: the ZIP code area · 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.

Zone10a30 to 35 °F
Coldest night−1.1 to 1.7 °C
Last frostrare
First frostrare
2012 zone10a

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 10a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Port Saint Lucie, 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 Ft Pierce, FL — 9 miles away, elevation 26 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 34986 came on Jan 12 — about the same time as the 1991–2020 average (Jan 14).

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 10a in Florida

480 plants native to the lower 48 states, recorded in Florida, and rated by the USDA to survive 30 °F or colder — the bottom of zone 10a. Each links to its USDA PLANTS profile.

Trees 67

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 116

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 146

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 131

American cupscale3 ft · blooms early summer · high shade tolerance · to −18 °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 °Fbig cordgrass8 ft · blooms spring · high shade tolerance · to −3 °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 Port Saint Lucie, FL.

Soil in Port Saint Lucie, FL

The center of ZIP 34986 is mapped as Water: built-over ground without natural soil data. Garden soil here is usually imported or disturbed — test before you plant.

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 34986; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Port Saint Lucie, FL

Summer high89 °Faverage high, July
Winter low53 °Faverage low, January
Hot days70days a year at 90 °F or more
Freezing nights1nights a year at 32 °F or less
Growing degree days8,589base 50 °F — the season’s usable heat
Longest day13 h 52 mindaylight on June 21
Shortest day10 h 25 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation60.1 inper year, rain and melted snow

Average high and low, by month

40°50°60°70°80°90°100°January: average high 72 °F, low 53 °F 72°53° JanFebruary: average high 74 °F, low 55 °F 74°55° FebMarch: average high 77 °F, low 59 °F 77°59° MarApril: average high 81 °F, low 64 °F 81°64° AprMay: average high 84 °F, low 69 °F 84°69° MayJune: average high 88 °F, low 73 °F 88°73° JunJuly: average high 89 °F, low 74 °F 89°74° JulAugust: average high 89 °F, low 75 °F 89°75° AugSeptember: average high 88 °F, low 74 °F 88°74° SepOctober: average high 84 °F, low 70 °F 84°70° OctNovember: average high 78 °F, low 62 °F 78°62° NovDecember: average high 74 °F, low 57 °F 74°57° Dec

Precipitation by month inches

0″2″4″6″8″January: 3.07 in precipitation 3.1 JanFebruary: 2.43 in precipitation 2.4 FebMarch: 3.44 in precipitation 3.4 MarApril: 3.00 in precipitation 3.0 AprMay: 5.19 in precipitation 5.2 MayJune: 8.25 in precipitation 8.3 JunJuly: 6.47 in precipitation 6.5 JulAugust: 7.89 in precipitation 7.9 AugSeptember: 7.95 in precipitation 8.0 SepOctober: 5.69 in precipitation 5.7 OctNovember: 3.48 in precipitation 3.5 NovDecember: 3.20 in precipitation 3.2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Ft Pierce, FL (9 mi away); precipitation: Tradition 5.6 W, FL (5 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 10a.

3498310a
Port Saint Lucie, FL · 3 mi
3494810a
Fort Pierce, FL · 4 mi
3495410a
Fort Pierce, FL · 4 mi
3497910a
Fort Pierce, FL · 4 mi
3498510a
Port Saint Lucie, FL · 4 mi
3498110a
Fort Pierce, FL · 5 mi
3495310a
Port Saint Lucie, FL · 6 mi
3498710a
Port Saint Lucie, FL · 6 mi

All 7 ZIP codes in Port Saint Lucie → · Florida planting zones →

Questions about 34986

What planting zone is ZIP code 34986?

ZIP code 34986 (Port Saint Lucie, FL) is in USDA hardiness zone 10a on the 2023 map: the coldest night of an average winter reaches 30 to 35 °F (−1.1 to 1.7 °C).

How much rain and snow does 34986 get?

About 60.1 inches of precipitation a year (NOAA 1991–2020 normals, Tradition 5.6 W station).

How hot do summers get in Port Saint Lucie, FL?

The average high peaks at 89 °F in July, with about 70 days a year at 90 °F or more.

Did spring come early in Port Saint Lucie, FL in 2026?

Spring leaf-out near 34986 came on Jan 12 in 2026, about the same as the 1991–2020 average (Jan 14), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Port Saint Lucie, FL?

Short-day onions: the longest day near 34986 is 13 h 52 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.