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

Planting zone for Hobe Sound, FL

Hobe Sound, FL is in USDA zone 10b across its 2 ZIP codes.

Hobe Sound on the zone map

Outlined: its 1 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.

Zone10b35 to 40 °F
ZIP codes2
Last frostrare
First frostrare
Growing seasonall year

10b 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Hobe Sound, 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 Port Salerno 5w, 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 33475 came on Jan 11 — about the same time as the 1991–2020 average (Jan 12).

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 Hobe Sound, FL.

Soil in Hobe Sound, FL

The soil mapped at the center of ZIP 33475 is Paola — sand, excessively drained.

TextureSanddrains and warms fast; dries out and needs more feeding
pH6.4slightly acidic; most vegetables like 6.0–7.0
DrainageExcessively drainednatural drainage class
Organic matter0.25%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Paola and St. Lucie sands, 0 to 8 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 33475; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Hobe Sound, FL

Summer high91 °Faverage high, August
Winter low54 °Faverage low, January
Hot days86days a year at 90 °F or more
Freezing nights1nights a year at 32 °F or less
Growing degree days8,678base 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
Precipitation64.2 inper year, rain and melted snow

Average high and low, by month

40°50°60°70°80°90°100°January: average high 74 °F, low 54 °F 74°54° JanFebruary: average high 76 °F, low 55 °F 76°55° FebMarch: average high 79 °F, low 58 °F 79°58° MarApril: average high 83 °F, low 62 °F 83°62° AprMay: average high 86 °F, low 67 °F 86°67° MayJune: average high 89 °F, low 72 °F 89°72° JunJuly: average high 90 °F, low 73 °F 90°73° JulAugust: average high 91 °F, low 74 °F 91°74° AugSeptember: average high 89 °F, low 72 °F 89°72° SepOctober: average high 85 °F, low 68 °F 85°68° OctNovember: average high 79 °F, low 62 °F 79°62° NovDecember: average high 76 °F, low 57 °F 76°57° Dec

Precipitation by month inches

0″2″4″6″8″10″January: 3.17 in precipitation 3.2 JanFebruary: 2.27 in precipitation 2.3 FebMarch: 3.95 in precipitation 4.0 MarApril: 2.87 in precipitation 2.9 AprMay: 5.73 in precipitation 5.7 MayJune: 9.56 in precipitation 9.6 JunJuly: 7.00 in precipitation 7.0 JulAugust: 9.03 in precipitation 9.0 AugSeptember: 9.17 in precipitation 9.2 SepOctober: 5.05 in precipitation 5.0 OctNovember: 3.44 in precipitation 3.4 NovDecember: 2.92 in precipitation 2.9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Port Salerno 5w, FL (8 mi away); precipitation: Port Salerno 5w, FL (8 mi away). Daylight is calculated from latitude.

ZIP codes in Hobe Sound

3345510b
35 to 40 °F
3347510b
35 to 40 °F

Florida planting zones →

Questions about Hobe Sound

What planting zone is Hobe Sound, FL?

Hobe Sound, FL is in USDA hardiness zone 10b on the 2023 map (10b: 35 to 40 °F).

What kind of onions grow in Hobe Sound, FL?

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

How much rain and snow does Hobe Sound, FL get?

About 64.2 inches of precipitation a year (NOAA 1991–2020 normals).