Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 30, 2026

Planting zone for Port Saint Lucie, FL

Port Saint Lucie, FL is in USDA zone 10a across its 7 ZIP codes.

Port Saint Lucie on the zone map

Outlined: its 6 ZIP code areas · 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

ZIP codes7

Last frostrare

First frostrare

Growing seasonall year

10a 7 ZIPs

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 Stuart, FL, 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 34985 came on Jan 11 — 3 days earlier than the 1991–2020 average (Jan 14).

average
Jan 142026
Jan 11

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.

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 soil mapped at the center of ZIP 34985 is Nettles — sand, poorly drained.

TextureSanddrains and warms fast; dries out and needs more feeding

pH5.1strongly acidic; most vegetables like 6.0–7.0

DrainagePoorly drainedconsider raised beds

Organic matter2.75%moderate

Hydrologic groupC/Dslow when drained; wet otherwise

Farmland classFarmland of unique importanceUSDA classification

Map unit: Nettles and Oldsmar sands.

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 34985; 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 low57 °Faverage low, January

Hot days37days a year at 90 °F or more

Freezing nights0nights a year at 32 °F or less

Growing degree days9,216base 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

Precipitation61 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Nettles Is, FL (8 mi away); precipitation: Port St. Lucie 4.0 Ne, FL (3 mi away). Daylight is calculated from latitude.