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

Planting zone for Roseburg, OR

Roseburg, OR is in USDA zones 8b to 9a across its 2 ZIP codes. The median last spring frost is March 19 and the first fall frost November 20.

Roseburg on the zone map

Outlined: its 2 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.

Zones8b–9a15 to 25 °F
ZIP codes2
Last frostMar 19
First frostNov 20
Growing season245 days

8b 1 ZIP   9a 1 ZIP

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Roseburg, OR…

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 Roseburg, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 19median — 50% chance of a later frost
Safe for tender plantsApril 13only 10% chance of frost after
First fall frostNovember 20median — 10% chance by Oct 27
Growing season245 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 13 and returns around December 11.

From the NOAA station Roseburg Regional Airport, OR, elevation 525 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 Roseburg

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 5 – Feb 19
SpinachSow outdoors · Feb 5 – Feb 26
Broccoli, cabbageStart indoors · Jan 8 – Jan 22
Broccoli, cabbageTransplant · Feb 26 – Mar 12
Onion setsPlant outdoors · Feb 19 – Mar 5
PotatoesPlant outdoors · Feb 26 – Mar 12
LettuceSow outdoors · Feb 19 – Mar 5
Carrots, beetsSow outdoors · Feb 26 – Mar 12
TomatoesStart indoors · Jan 22 – Feb 5
TomatoesTransplant · Mar 26 – Apr 9
Peppers, eggplantStart indoors · Jan 8 – Jan 22
Peppers, eggplantTransplant · Apr 2 – Apr 16
BeansSow outdoors · Mar 26 – Apr 9
Sweet cornSow outdoors · Mar 26 – Apr 9
Cucumbers, squashSow outdoors · Mar 26 – Apr 9
Fall lettuce, spinachSow outdoors · Sep 25 – Oct 9
GarlicPlant cloves · Nov 6 – Dec 11
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 19) and first fall frost (Nov 20) 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 97470 came on Feb 17 — about the same time as the 1991–2020 average (Feb 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 8b in Oregon

661 plants native to the lower 48 states, recorded in Oregon, and rated by the USDA to survive 15 °F or colder — the bottom of zone 8b. Each links to its USDA PLANTS profile.

Trees 43

Alaska cedar75 ft · blooms mid spring · low shade tolerance · to −22 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fbigleaf maple60 ft · blooms mid spring · medium shade tolerance · to −14 °Fblack locust60 ft · blooms spring · high shade tolerance · to −37 °Fboxelder60 ft · blooms early spring · low shade tolerance · to −46 °FBrewer spruce100 ft · blooms early summer · low shade tolerance · to −13 °F

Shrubs 132

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °Falderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °Falpine laurel1 ft · blooms late spring · low shade tolerance · to −28 °Fantelope bitterbrush6 ft · blooms early spring · medium shade tolerance · to −36 °Fbeaked hazelnut15 ft · blooms early spring · low shade tolerance · to −47 °Fbig sagebrush4 ft · blooms mid summer · high shade tolerance · to −43 °F

Wildflowers & perennials 305

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 eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °F

Grasses 166

Alaska brome5 ft · blooms late spring · low shade tolerance · to −18 °FAlaska oniongrass3 ft · blooms mid spring · low shade tolerance · to −33 °Falkali 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 °FAmerican beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °F

Vines 2

riverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fwestern 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 Roseburg, OR.

Soil in Roseburg, OR

The soil mapped at the center of ZIP 97470 is Curtin — clay, somewhat poorly drained.

TextureClayholds water and nutrients; slow to drain and warm up
pH7.0neutral; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter4%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Curtin clay, 3 to 12 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 97470; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Roseburg, OR

Summer high86 °Faverage high, July
Winter low37 °Faverage low, January
Hot days31days a year at 90 °F or more
Freezing nights28nights a year at 32 °F or less
Growing degree days3,007base 50 °F — the season’s usable heat
Longest day15 h 23 mindaylight on June 21
Shortest day8 h 58 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation36.4 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 50 °F, low 37 °F 50°37° JanFebruary: average high 54 °F, low 38 °F 54°38° FebMarch: average high 59 °F, low 40 °F 59°40° MarApril: average high 63 °F, low 43 °F 63°43° AprMay: average high 71 °F, low 48 °F 71°48° MayJune: average high 77 °F, low 53 °F 77°53° JunJuly: average high 86 °F, low 57 °F 86°57° JulAugust: average high 86 °F, low 57 °F 86°57° AugSeptember: average high 80 °F, low 52 °F 80°52° SepOctober: average high 67 °F, low 45 °F 67°45° OctNovember: average high 54 °F, low 41 °F 54°41° NovDecember: average high 48 °F, low 37 °F 48°37° Dec

Precipitation by month inches

0″2″4″6″January: 5.00 in precipitation 5.0 JanFebruary: 3.91 in precipitation 3.9 FebMarch: 3.92 in precipitation 3.9 MarApril: 3.56 in precipitation 3.6 AprMay: 2.60 in precipitation 2.6 MayJune: 1.42 in precipitation 1.4 JunJuly: 0.38 in precipitation 0.4 JulAugust: 0.44 in precipitation 0.4 AugSeptember: 0.97 in precipitation 1.0 SepOctober: 2.67 in precipitation 2.7 OctNovember: 5.27 in precipitation 5.3 NovDecember: 6.29 in precipitation 6.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Roseburg Regional Airport, OR (6 mi away); precipitation: S Deer Creek, OR (6 mi away). Daylight is calculated from latitude.

ZIP codes in Roseburg

974708b
15 to 20 °F
974719a
20 to 25 °F

Oregon planting zones →

Questions about Roseburg

What planting zone is Roseburg, OR?

Roseburg, OR is in USDA hardiness zones 8b to 9a on the 2023 map (8b: 15 to 20 °F; 9a: 20 to 25 °F).

When is the last frost in Roseburg, OR?

The median last spring frost is March 19 and the median first fall frost is November 20 (NOAA 1991–2020 normals, Roseburg Regional Airport station).

When can I plant a garden in Roseburg, OR?

Cool-season crops like peas and spinach go in around Feb 5 – Feb 26; tomatoes, peppers, beans and squash after about Mar 26, once frost risk has passed.

What kind of onions grow in Roseburg, OR?

Long-day onions: the longest day is 15 h 23 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

How much rain and snow does Roseburg, OR get?

About 36.4 inches of precipitation a year (NOAA 1991–2020 normals).