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

Planting zone for 85325 — Bouse, AZ

ZIP code 85325 (Bouse, La Paz County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is February 18 and the first fall frost November 28.

Where ZIP 85325 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 frostFeb 18
First frostNov 28
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 Bouse, 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 Bouse, AZ

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 18median — 50% chance of a later frost
Safe for tender plantsMarch 12only 10% chance of frost after
First fall frostNovember 28median — 10% chance by Nov 12
Growing season284 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 29 and returns around December 9.

From the NOAA station Bouse, AZ — 9 miles away, elevation 925 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 85325

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 7 – Jan 21
SpinachSow outdoors · Jan 7 – Jan 28
Broccoli, cabbageStart indoors · Dec 10 – Dec 24
Broccoli, cabbageTransplant · Jan 28 – Feb 11
Onion setsPlant outdoors · Jan 21 – Feb 4
PotatoesPlant outdoors · Jan 28 – Feb 11
LettuceSow outdoors · Jan 21 – Feb 4
Carrots, beetsSow outdoors · Jan 28 – Feb 11
TomatoesStart indoors · Dec 24 – Jan 7
TomatoesTransplant · Feb 25 – Mar 11
Peppers, eggplantStart indoors · Dec 10 – Dec 24
Peppers, eggplantTransplant · Mar 4 – Mar 18
BeansSow outdoors · Feb 25 – Mar 11
Sweet cornSow outdoors · Feb 25 – Mar 11
Cucumbers, squashSow outdoors · Feb 25 – Mar 11
Fall lettuce, spinachSow outdoors · Oct 3 – Oct 17
GarlicPlant cloves · Nov 14 – Dec 19
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 18) and first fall frost (Nov 28) 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 85325 came on Jan 22 — 4 days earlier than the 1991–2020 average (Jan 26).

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 Arizona

492 plants native to the lower 48 states, recorded in Arizona, and rated by the USDA to survive 20 °F or colder — the bottom of zone 9a. Each links to its USDA PLANTS profile.

Trees 26

Arizona cypress50 ft · blooms spring · low shade tolerance · to −23 °FArizona madrone30 ft · blooms late spring · high shade tolerance · to −4 °FArizona sycamore80 ft · blooms early spring · high shade tolerance · to −8 °FArizona walnut50 ft · blooms late spring · high shade tolerance · to −33 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fblue spruce100 ft · blooms late spring · medium shade tolerance · to −38 °F

Shrubs 109

alderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °FAmerican tarwort3 ft · blooms late spring · high shade tolerance · to −23 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °FApache plume6 ft · blooms late spring · high shade tolerance · to −23 °Fbig sagebrush4 ft · blooms mid summer · high shade tolerance · to −43 °F

Wildflowers & perennials 197

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °Falpine mountainsorrel1 ft · blooms mid summer · medium shade tolerance · to −43 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °FAmerican bistort1.5 ft · blooms mid spring · high shade tolerance · to −38 °FAmerican century plant6 ft · blooms indeterminate · high shade tolerance · to 12 °F

Grasses 151

alkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °Falkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °Falpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °Fanalogue sedge1.5 ft · blooms late spring · medium shade tolerance · to −38 °FArizona cottontop4 ft · blooms late summer · high shade tolerance · to −13 °FArizona fescue2 ft · blooms late spring · high shade tolerance · to −23 °F

Vines 1

western white clematis1 ft · blooms mid summer · medium shade tolerance · to −38 °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 Bouse, AZ.

Soil in Bouse, AZ

The soil mapped at the center of ZIP 85325 is Hyder — very gravelly loam, somewhat excessively drained.

TextureVery gravelly loama good balance for most vegetables
pH8.0alkaline; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter0.3%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Hyder-Plomosa-Rock outcrop complex, 3 to 70 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 85325; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Bouse, AZ

Summer high108 °Faverage high, July
Winter low36 °Faverage low, December
Hot days173days a year at 90 °F or more
Freezing nights26nights a year at 32 °F or less
Growing degree days7,943base 50 °F — the season’s usable heat
Longest day14 h 25 mindaylight on June 21
Shortest day9 h 53 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation5.7 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°110°120°32 °FJanuary: average high 66 °F, low 37 °F 66°37° JanFebruary: average high 70 °F, low 41 °F 70°41° FebMarch: average high 78 °F, low 46 °F 78°46° MarApril: average high 86 °F, low 52 °F 86°52° AprMay: average high 95 °F, low 61 °F 95°61° MayJune: average high 105 °F, low 69 °F 105°69° JunJuly: average high 108 °F, low 78 °F 108°78° JulAugust: average high 107 °F, low 78 °F 107°78° AugSeptember: average high 101 °F, low 69 °F 101°69° SepOctober: average high 89 °F, low 55 °F 89°55° OctNovember: average high 75 °F, low 43 °F 75°43° NovDecember: average high 64 °F, low 36 °F 64°36° Dec

Precipitation by month inches

0″1″January: 0.66 in precipitation 0.7 JanFebruary: 0.80 in precipitation 0.8 FebMarch: 0.51 in precipitation 0.5 MarApril: 0.19 in precipitation 0.2 AprMay: 0.13 in precipitation 0.1 MayJune: 0.04 in precipitation 0.0 JunJuly: 0.48 in precipitation 0.5 JulAugust: 0.73 in precipitation 0.7 AugSeptember: 0.77 in precipitation 0.8 SepOctober: 0.38 in precipitation 0.4 OctNovember: 0.34 in precipitation 0.3 NovDecember: 0.64 in precipitation 0.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Bouse, AZ (9 mi away); precipitation: Bouse, AZ (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

853489a
Salome, AZ · 22 mi
853449b
Parker, AZ · 23 mi
853579a
Wenden, AZ · 24 mi
922429b
Earp, CA · 29 mi
853599b
Quartzsite, AZ · 29 mi
853469a
Quartzsite, AZ · 29 mi
853719a
Poston, AZ · 30 mi
9226710a
Parker Dam, CA · 30 mi

Arizona planting zones →

Questions about 85325

What planting zone is ZIP code 85325?

ZIP code 85325 (Bouse, AZ) 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).

When is the last frost in Bouse, AZ?

The median last spring frost (32 °F) near 85325 is February 18; after March 12 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Bouse station.

When is the first frost in Bouse, AZ?

The median first fall frost near 85325 is November 28, giving a median frost-free growing season of 284 days.

When should I plant tomatoes in 85325?

Start tomato seeds indoors around Dec 24 – Jan 7 and set transplants outside around Feb 25 – Mar 11, one to three weeks after the median last frost.

How much rain and snow does 85325 get?

About 5.7 inches of precipitation a year (NOAA 1991–2020 normals, Bouse station).

How hot do summers get in Bouse, AZ?

The average high peaks at 108 °F in July, with about 173 days a year at 90 °F or more.

What kind of soil does 85325 have?

The USDA soil survey maps Hyder at the center of ZIP 85325: very gravelly loam, somewhat excessively drained, pH about 8.0 (alkaline).

Did spring come early in Bouse, AZ in 2026?

Spring leaf-out near 85325 came on Jan 22 in 2026, 4 days earlier than the 1991–2020 average (Jan 26), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Bouse, AZ?

Intermediate onions: the longest day near 85325 is 14 h 25 min, so day-neutral types bulb best; long-day varieties may not bulb fully.