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

Planting zone for 04007 — Biddeford, ME

ZIP code 04007 (Biddeford, York County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 9 and the first fall frost October 3.

Where ZIP 04007 is

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.

Zone5b−15 to −10 °F
Coldest night−26.1 to −23.3 °C
Last frostMay 9
First frostOct 3
2012 zone5b

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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Biddeford, ME…

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 Biddeford, ME

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 9median — 50% chance of a later frost
Safe for tender plantsMay 22only 10% chance of frost after
First fall frostOctober 3median — 10% chance by Sep 20
Growing season146 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 29 and returns around October 15.

From the NOAA station Kennebunkport, ME — 7 miles away, elevation 20 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 04007

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 28 – Apr 11
SpinachSow outdoors · Mar 28 – Apr 18
Broccoli, cabbageStart indoors · Feb 28 – Mar 14
Broccoli, cabbageTransplant · Apr 18 – May 2
Onion setsPlant outdoors · Apr 11 – Apr 25
PotatoesPlant outdoors · Apr 18 – May 2
LettuceSow outdoors · Apr 11 – Apr 25
Carrots, beetsSow outdoors · Apr 18 – May 2
TomatoesStart indoors · Mar 14 – Mar 28
TomatoesTransplant · May 16 – May 30
Peppers, eggplantStart indoors · Feb 28 – Mar 14
Peppers, eggplantTransplant · May 23 – Jun 6
BeansSow outdoors · May 16 – May 30
Sweet cornSow outdoors · May 16 – May 30
Cucumbers, squashSow outdoors · May 16 – May 30
Fall lettuce, spinachSow outdoors · Aug 8 – Aug 22
GarlicPlant cloves · Sep 19 – Oct 24
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 9) and first fall frost (Oct 3) 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 04007 came on Apr 16 — about the same time as the 1991–2020 average (Apr 16).

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 5b in Maine

493 plants native to the lower 48 states, recorded in Maine, and rated by the USDA to survive −15 °F or colder — the bottom of zone 5b. Each links to its USDA PLANTS profile.

Trees 55

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 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 98

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falpine bearberry0.5 ft · blooms early spring · medium shade tolerance · to −62 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °F

Wildflowers & perennials 169

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °Falpine sweetvetch2 ft · blooms early summer · high shade tolerance · to −62 °FAmerican alpine speedwell1 ft · blooms summer · medium shade tolerance · to −28 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °F

Grasses 153

alpine timothy1.4 ft · blooms late spring · medium shade tolerance · to −43 °FAmerican beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °FAmerican cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °F

Vines 6

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °Ftrumpet honeysuckle16 ft · blooms late summer · low shade tolerance · to −33 °FVirginia creeper1 ft · blooms late spring · medium shade tolerance · to −28 °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 Biddeford, ME.

Soil in Biddeford, ME

The soil mapped at the center of ZIP 04007 is Lyman — moderately decomposed plant material, somewhat excessively drained.

TextureModerately decomposed plant materialtop layer
pH3.5strongly acidic; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter85%high
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Lyman-Rock outcrop complex, 3 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 04007; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Biddeford, ME

Summer high77 °Faverage high, July
Winter low13 °Faverage low, January
Hot days4days a year at 90 °F or more
Freezing nights160nights a year at 32 °F or less
Growing degree days1,878base 50 °F — the season’s usable heat
Longest day15 h 25 mindaylight on June 21
Shortest day8 h 57 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation50.6 inper year, rain and melted snow

Average high and low, by month

0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 33 °F, low 13 °F 33°13° JanFebruary: average high 35 °F, low 14 °F 35°14° FebMarch: average high 41 °F, low 23 °F 41°23° MarApril: average high 52 °F, low 32 °F 52°32° AprMay: average high 62 °F, low 43 °F 62°43° MayJune: average high 71 °F, low 52 °F 71°52° JunJuly: average high 77 °F, low 58 °F 77°58° JulAugust: average high 76 °F, low 57 °F 76°57° AugSeptember: average high 69 °F, low 49 °F 69°49° SepOctober: average high 59 °F, low 38 °F 59°38° OctNovember: average high 48 °F, low 29 °F 48°29° NovDecember: average high 39 °F, low 20 °F 39°20° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 3.72 in precipitation 3.7 JanFebruary: 3.67 in precipitation 3.7 FebMarch: 4.34 in precipitation 4.3 MarApril: 4.44 in precipitation 4.4 AprMay: 3.73 in precipitation 3.7 MayJune: 4.17 in precipitation 4.2 JunJuly: 4.01 in precipitation 4.0 JulAugust: 3.78 in precipitation 3.8 AugSeptember: 3.96 in precipitation 4.0 SepOctober: 5.66 in precipitation 5.7 OctNovember: 4.19 in precipitation 4.2 NovDecember: 4.98 in precipitation 5.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Kennebunkport, ME (7 mi away); precipitation: Biddeford 1.5 Nne, ME (4 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.

040466a
Kennebunkport, ME · 3 mi
040055b
Biddeford, ME · 3 mi
040945b
West Kennebunk, ME · 5 mi
040435b
Kennebunk, ME · 5 mi
040636a
Ocean Park, ME · 6 mi
040725b
Saco, ME · 7 mi
040646a
Old Orchard Beach, ME · 7 mi
040146a
Cape Porpoise, ME · 8 mi

All 2 ZIP codes in Biddeford → · Maine planting zones →

Questions about 04007

What planting zone is ZIP code 04007?

ZIP code 04007 (Biddeford, ME) is in USDA hardiness zone 5b on the 2023 map: the coldest night of an average winter reaches −15 to −10 °F (−26.1 to −23.3 °C).

When is the last frost in Biddeford, ME?

The median last spring frost (32 °F) near 04007 is May 9; after May 22 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Kennebunkport station.

When is the first frost in Biddeford, ME?

The median first fall frost near 04007 is October 3, giving a median frost-free growing season of 146 days.

When should I plant tomatoes in 04007?

Start tomato seeds indoors around Mar 14 – Mar 28 and set transplants outside around May 16 – May 30, one to three weeks after the median last frost.

How much rain and snow does 04007 get?

About 50.6 inches of precipitation a year (NOAA 1991–2020 normals, Biddeford 1.5 Nne station).

How hot do summers get in Biddeford, ME?

The average high peaks at 77 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 04007 have?

The USDA soil survey maps Lyman at the center of ZIP 04007: moderately decomposed plant material, somewhat excessively drained, pH about 3.5 (strongly acidic).

Did spring come early in Biddeford, ME in 2026?

Spring leaf-out near 04007 came on Apr 16 in 2026, about the same as the 1991–2020 average (Apr 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Biddeford, ME?

Long-day onions: the longest day near 04007 is 15 h 25 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).