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

Planting zone for Edmonds, WA

Edmonds, WA is in USDA zone 9a across its 2 ZIP codes. The median last spring frost is March 9 and the first fall frost November 17.

Edmonds 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.

Zone9a20 to 25 °F

ZIP codes2

Last frostMar 9

First frostNov 17

Growing season250 days

9a 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

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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 Edmonds, WA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 9median — 50% chance of a later frost

Safe for tender plantsMarch 29only 10% chance of frost after

First fall frostNovember 17median — 10% chance by Oct 31

Growing season250 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 13 and returns around December 6.

From the NOAA station Everett Snohomish Airport, WA, elevation 607 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 Edmonds

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Jan 26 – Feb 9

SpinachSow outdoors · Jan 26 – Feb 16

Broccoli, cabbageStart indoors · Dec 29 – Jan 12

Broccoli, cabbageTransplant · Feb 16 – Mar 2

Onion setsPlant outdoors · Feb 9 – Feb 23

PotatoesPlant outdoors · Feb 16 – Mar 2

LettuceSow outdoors · Feb 9 – Feb 23

Carrots, beetsSow outdoors · Feb 16 – Mar 2

TomatoesStart indoors · Jan 12 – Jan 26

TomatoesTransplant · Mar 16 – Mar 30

Peppers, eggplantStart indoors · Dec 29 – Jan 12

Peppers, eggplantTransplant · Mar 23 – Apr 6

BeansSow outdoors · Mar 16 – Mar 30

Sweet cornSow outdoors · Mar 16 – Mar 30

Cucumbers, squashSow outdoors · Mar 16 – Mar 30

Fall lettuce, spinachSow outdoors · Sep 22 – Oct 6

GarlicPlant cloves · Nov 3 – Dec 8

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 9) and first fall frost (Nov 17) 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 98026 came on Feb 14 — 5 days earlier than the 1991–2020 average (Feb 19).

average
Feb 192026
Feb 14

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 Washington

617 plants native to the lower 48 states, recorded in Washington, 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 Edmonds, WA.

Soil in Edmonds, WA

The soil mapped at the center of ZIP 98026 is Alderwood — gravelly sandy loam, moderately well drained.

TextureGravelly sandy loamdrains and warms fast; dries out and needs more feeding

pH5.8moderately acidic; most vegetables like 6.0–7.0

DrainageModerately well drainednatural drainage class

Organic matter9%high

Hydrologic groupBwater soaks in moderately

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Alderwood gravelly sandy loam, 15 to 30 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 98026; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Edmonds, WA

Summer high73 °Faverage high, August

Winter low36 °Faverage low, December

Hot days1days a year at 90 °F or more

Freezing nights29nights a year at 32 °F or less

Growing degree days1,771base 50 °F — the season’s usable heat

Longest day16 h 01 mindaylight on June 21

Shortest day8 h 24 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation33.4 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: Everett Snohomish Airport, WA (6 mi away); precipitation: Everett Snohomish Airport, WA (6 mi away). Daylight is calculated from latitude.

ZIP codes in Edmonds

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Questions about Edmonds

What planting zone is Edmonds, WA?

Edmonds, WA is in USDA hardiness zone 9a on the 2023 map (9a: 20 to 25 °F).

When is the last frost in Edmonds, WA?

The median last spring frost is March 9 and the median first fall frost is November 17 (NOAA 1991–2020 normals, Everett Snohomish Airport station).

When can I plant a garden in Edmonds, WA?

Cool-season crops like peas and spinach go in around Jan 26 – Feb 16; tomatoes, peppers, beans and squash after about Mar 16, once frost risk has passed.

What kind of onions grow in Edmonds, WA?

Long-day onions: the longest day is 16 h 01 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

How much rain and snow does Edmonds, WA get?

About 33.4 inches of precipitation a year (NOAA 1991–2020 normals).