Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 32068 — Middleburg, FL

ZIP code 32068 (Middleburg, Clay County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F.

Where ZIP 32068 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.

Zone9a20 to 25 °F

Coldest night−6.7 to −3.9 °C

Last frostrare

First frostrare

2012 zone9a

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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Middleburg, 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 Jacksonville NAS, FL — 17 miles away, elevation 20 ft) the median growing season is 330 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 32068 came on Jan 17 — 6 days earlier than the 1991–2020 average (Jan 23).

average
Jan 232026
Jan 17

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 9a in Florida

473 plants native to the lower 48 states, recorded in Florida, and rated by the USDA to survive 20 °F or colder — the bottom of zone 9a. 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 Middleburg, FL.

Soil in Middleburg, FL

The soil mapped at the center of ZIP 32068 is Ousley — fine sand, somewhat poorly drained.

TextureFine sanddrains and warms fast; dries out and needs more feeding

pH5.0strongly acidic; most vegetables like 6.0–7.0

DrainageSomewhat poorly drainedconsider raised beds

Organic matter0.25%low — add compost

Hydrologic groupAwater soaks in fast

Farmland classNot prime farmlandUSDA classification

Map unit: Ousley fine sand, occasionally flooded.

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 32068; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Middleburg, FL

Summer high92 °Faverage high, July

Winter low47 °Faverage low, January

Hot days96days a year at 90 °F or more

Freezing nights4nights a year at 32 °F or less

Growing degree days7,918base 50 °F — the season’s usable heat

Longest day14 h 05 mindaylight on June 21

Shortest day10 h 12 mindaylight on December 21

Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb

Precipitation53.4 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: Jacksonville NAS, FL (17 mi away); precipitation: Orange Park 4.1 Wsw, FL (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

320509a

Middleburg, FL · 2 mi

320659a

Orange Park, FL · 6 mi

320309a

Doctors Inlet, FL · 7 mi

320799a

Penney Farms, FL · 9 mi

322229a

Jacksonville, FL · 9 mi

320069b

Fleming Island, FL · 10 mi

320739b

Orange Park, FL · 10 mi

320039b

Fleming Island, FL · 10 mi

All 2 ZIP codes in Middleburg → · Florida planting zones →

Questions about 32068

What planting zone is ZIP code 32068?

ZIP code 32068 (Middleburg, FL) is in USDA hardiness zone 9a on the 2023 map: the coldest night of an average winter reaches 20 to 25 °F (−6.7 to −3.9 °C).

How much rain and snow does 32068 get?

About 53.4 inches of precipitation a year (NOAA 1991–2020 normals, Orange Park 4.1 Wsw station).

How hot do summers get in Middleburg, FL?

The average high peaks at 92 °F in July, with about 96 days a year at 90 °F or more.

What kind of soil does 32068 have?

The USDA soil survey maps Ousley at the center of ZIP 32068: fine sand, somewhat poorly drained, pH about 5.0 (strongly acidic).

Did spring come early in Middleburg, FL in 2026?

Spring leaf-out near 32068 came on Jan 17 in 2026, 6 days earlier than the 1991–2020 average (Jan 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Middleburg, FL?

Short-day onions: the longest day near 32068 is 14 h 05 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.