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

Planting zone for 85132 — Florence, AZ

ZIP code 85132 (Florence, Pinal County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is January 30 and the first fall frost December 12.

Where ZIP 85132 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.

Zone9b25 to 30 °F

Coldest night−3.9 to −1.1 °C

Last frostJan 30

First frostDec 12

2012 zone9b

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 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Florence, AZ…

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 in Florence, AZ

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostJanuary 30median — 50% chance of a later frost

Safe for tender plantsFebruary 24only 10% chance of frost after

First fall frostDecember 12median — 10% chance by Nov 22

Growing season319 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 8 and returns around December 26.

From the NOAA station Florence, AZ — 12 miles away, elevation 1,401 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 85132

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Dec 19 – Jan 2

SpinachSow outdoors · Dec 19 – Jan 9

Broccoli, cabbageStart indoors · Nov 21 – Dec 5

Broccoli, cabbageTransplant · Jan 9 – Jan 23

Onion setsPlant outdoors · Jan 2 – Jan 16

PotatoesPlant outdoors · Jan 9 – Jan 23

LettuceSow outdoors · Jan 2 – Jan 16

Carrots, beetsSow outdoors · Jan 9 – Jan 23

TomatoesStart indoors · Dec 5 – Dec 19

TomatoesTransplant · Feb 6 – Feb 20

Peppers, eggplantStart indoors · Nov 21 – Dec 5

Peppers, eggplantTransplant · Feb 13 – Feb 27

BeansSow outdoors · Feb 6 – Feb 20

Sweet cornSow outdoors · Feb 6 – Feb 20

Cucumbers, squashSow outdoors · Feb 6 – Feb 20

Fall lettuce, spinachSow outdoors · Oct 17 – Oct 31

GarlicPlant cloves · Nov 28 – Jan 2

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jan 30) and first fall frost (Dec 12) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 85132 came on Jan 23 — 3 days earlier than the 1991–2020 average (Jan 26).

average
Jan 262026
Jan 23

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 9b in Arizona

499 plants native to the lower 48 states, recorded in Arizona, and rated by the USDA to survive 25 °F or colder — the bottom of zone 9b. 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 Florence, AZ.

Soil in Florence, AZ

The soil mapped at the center of ZIP 85132 is Bucklebar — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding

pH6.9neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter0.75%low — add compost

Hydrologic groupCwater soaks in slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Bucklebar-Hayhook complex, 1 to 10 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 85132; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Florence, AZ

Summer high105 °Faverage high, July

Winter low41 °Faverage low, December

Hot days169days a year at 90 °F or more

Freezing nights10nights a year at 32 °F or less

Growing degree days8,251base 50 °F — the season’s usable heat

Longest day14 h 19 mindaylight on June 21

Shortest day9 h 59 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation9.5 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: Florence, AZ (12 mi away); precipitation: Ashurst Hayden Dam, AZ (12 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

851919a

Valley Farms, AZ · 14 mi

San Tan Valley, AZ · 27 mi

Arizona planting zones →

Questions about 85132

What planting zone is ZIP code 85132?

ZIP code 85132 (Florence, AZ) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).

When is the last frost in Florence, AZ?

The median last spring frost (32 °F) near 85132 is January 30; after February 24 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Florence station.

When is the first frost in Florence, AZ?

The median first fall frost near 85132 is December 12, giving a median frost-free growing season of 319 days.

When should I plant tomatoes in 85132?

Start tomato seeds indoors around Dec 5 – Dec 19 and set transplants outside around Feb 6 – Feb 20, one to three weeks after the median last frost.

How much rain and snow does 85132 get?

About 9.5 inches of precipitation a year (NOAA 1991–2020 normals, Ashurst Hayden Dam station).

How hot do summers get in Florence, AZ?

The average high peaks at 105 °F in July, with about 169 days a year at 90 °F or more.

What kind of soil does 85132 have?

The USDA soil survey maps Bucklebar at the center of ZIP 85132: sandy loam, well drained, pH about 6.9 (neutral).

Did spring come early in Florence, AZ in 2026?

Spring leaf-out near 85132 came on Jan 23 in 2026, 3 days earlier than the 1991–2020 average (Jan 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Florence, AZ?

Intermediate onions: the longest day near 85132 is 14 h 19 min, so day-neutral types bulb best; long-day varieties may not bulb fully.