Gig Harbor, Washington, sits in USDA hardiness zone 9a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Among the crops suited to this profile: kale, potato, garlic, and western red cedar. The site-level story — soil, sun, drainage — decides the rest.
Even in Gig Harbor, no two yards are alike.
A low spot, a south-facing slope, or a stand of trees moves the frost date and sun across a single Gig Harbor lot. Enter your address and we'll score 1,086 plants against your land's actual soil, sun, and frost.
We read public map data around Gig Harbor — soil, climate, flood, and parcel records. How we handle your address.
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Gig Harbor — the short answer
Gig Harbor, Washington: USDA zone 9a, about 264 days between hard freezes, across 4K acres of city.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 4
- Pierce County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 23
- Pierce County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~264
- Pierce County normal — NOAA 1991–2020, nearest to this town
- City area
- 4K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. No 30-year normal resolves at this town’s own centroid, so the hard-freeze dates are Pierce County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Gig Harbor's average, not your lot's — a low corner or a tree line moves it. Against Gig Harbor's 264-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Gig Harbor
Each reading below is measured for Gig Harbor itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsGig Harbor runs about 264 days between hard freezes (read from Pierce County, the closest normal to Gig Harbor) — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredGig Harbor sits in USDA hardiness zone 9a.
The zone sets which perennials, shrubs, and fruit trees live through an average winter here — a plant rated for a colder zone is a safe bet, one rated warmer needs winter protection or gets treated as an annual.
Match perennials and fruit to the zone before you buy, so nothing you plant is a gamble against the cold.
USDA PHZM 2023
The kind of country Gig Harbor is in
Gig Harbor sits in the Puget Lowland — EPA Level III, inside the wider Marine West Coast Forest. That is read at Gig Harbor's own centroid, and it is not what its county reads: Pierce County is mostly Cascades. The wider page above you is answering a different question about different ground.
What Grows in Gig Harbor
Plants matched to Gig Harbor's USDA zones 9a, ordered by how much hardiness margin each has here — the ones with room to spare at both ends of this town's band lead. Each links to its full growing profile.
Is it too late to plant in Gig Harbor?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 23 — long-season crops need about 90 days of runway, quick greens only 30. And with a calendar this mild, the honest answer is that planting barely stops — winter opens seasons colder regions never see.
What's on the federal record near Gig Harbor
Closest first, within ~10 miles of Gig Harbor. Listing isn't leaking, and distance isn't exposure.
- PAPE & SONS CONSTRUCTION INCUnderground Storage Tanks · 1200 ft
- GIG HARBOR PENINSULA YACHT BASIN INCUnderground Storage Tanks · 1900 ft
- CONANS SERVICE STATION LLCUnderground Storage Tanks · 1900 ft
- JULIAN L SCHMIDTKEUnderground Storage Tanks · 2100 ft
- EYRISH HEMLEY LAND COMPANYUnderground Storage Tanks · 0.5 mi
- 46TH AVE NW & ROSEDALE ST GIG HARBORUnderground Storage Tanks · 0.6 mi
- DOC PURDY CORRECTIONS CTRBrownfields · 0.6 mi
- METAGENICS INC GIG HARBORBrownfields · 0.6 mi
- JACKSON ROOFINGUnderground Storage Tanks · 0.6 mi
- BABY BEAU & BELLE INCUnderground Storage Tanks · 0.6 mi
- GIG HARBOR YACHT CLUBUnderground Storage Tanks · 0.7 mi
- WASHINGTON CORRECTIONS CENTER FOR WOMENUnderground Storage Tanks · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Gig Harbor's center, not your beds. Run your own address for what's upwind of you specifically.
Environmental Intelligence
The counts behind that headline — every source type on the record near Gig Harbor.
Sources Checked
within ~10 miles of Gig Harbor
Severity Distribution
within ~10 miles of Gig Harbor
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Gig Harbor, two things run higher than the national average within ~10 miles of Gig Harbor — Superfund (16 sites) and Underground Storage Tanks (454 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Gig Harbor
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,086 plant recommendations.
25+ data sources read at your address, not the Gig Harbor average
Your land is one point inside Gig Harbor
Everything above resolves to Gig Harbor as a whole — one PHZM band, read across 4K acres, with hard-freeze dates borrowed from Pierce County’s record because no 30-year normal resolves at this city’s own centroid. Your parcel is one point inside that footprint. Slope, tree cover, a low spot that pools cold air, and what is in the soil are all resolved at the address, and none of them are visible at city scale. That is the honest boundary of this page, and the reason the next step is a reading of your own ground rather than a better local average.
Your Lot vs the Gig Harbor Average
Gig Harbor Average
- ●USDA Zones 9a, averaged across Gig Harbor
- ●One soil character for all of Gig Harbor
- ●Frost dates read at Gig Harbor's scale: Mar 4 to Nov 23
YOUR Parcel
- ✓Your exact zone, not Gig Harbor's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Gig Harbor
Pull a site-specific report for your exact address in Gig Harbor, Washington — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Gig Harbor averages can't show:
We read public map data around Gig Harbor — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Gig Harbor average
How we know this about Gig Harbor
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Pierce County’s record, because none resolves here; boundaries and acreage from US Census TIGER/Line 2025; the contamination records from the federal sources named in their beats above. Soil is not read at city grain anywhere on this page — there is no city-resolution survey in our data, which is why you will find no soil grid here rather than a statewide one wearing a local label. The resolution ledger below names every figure this page inherited.
Common questions about Gig Harbor
When does frost risk typically end in Gig Harbor?
The last hard freeze (28°F) in Gig Harbor typically lands around Mar 4, per NOAA 1991–2020 climate normals — earlier than the light-frost dates most charts quote. That marks the hard freeze, not the last light frost — lighter frosts keep biting past it, which is why tender transplants here wait until about Mar 25.
When is the first frost in Gig Harbor?
The first hard freeze (28°F) in Gig Harbor typically arrives around Nov 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 9, so the watching starts about Oct 24 — about 264 days after the spring freeze cleared.
How long is the growing season in Gig Harbor?
Measured between 28°F hard freezes, Gig Harbor sees about 264 frost-free days — roughly Mar 4 through Nov 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 25 to Nov 9, about 229 days.
Is the soil safe to grow vegetables in Gig Harbor?
The federal record around Gig Harbor is a meaningful one — 692 documented sites, mostly Underground Storage Tanks entries (454), the nearest Underground Storage Tanks record about 0.2 miles out — so a soil test before new food beds is a sensible precaution here, not a reason to hold back from growing. Remember that proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what sits where.
How do I protect my plants from frost in Gig Harbor?
From about Oct 24 the job here turns from planting to protecting — the last start even a 30-day crop can finish. As the season closes around the first 28°F hard freeze near Nov 23 (NOAA 1991–2020 climate normals), three moves buy time: row cover or an old sheet over tender plants on still, clear nights; water the soil the afternoon before a freeze, so it holds warmth overnight; and harvest tomatoes, peppers and basil before Nov 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Gig Harbor's scale — its 9a band and its 264-day season. Your yard writes its own version of Gig Harbor's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
What this page reads at Gig Harbor’s own scale
4 of the readings below were taken at Gig Harbor's own scale — the 3,777 acres it covers and 692 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Gig Harbor's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 692 documented contamination sites on the federal record near Gig Harbor, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Gig Harbor's boundary and the 3,777 acres inside itUS Census TIGER/Line 2025
- Gig Harbor sits in the Puget Lowland — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Gig Harbor has no normal of its own, so its county's is the closest measured readfrom Pierce County
- Soil character — no town-scale survey exists, so Gig Harbor's 3,777 acres read through its county's SSURGO summaryfrom Pierce County
- The candidate plant list — Washington's curated set, filtered to this zone band and re-ordered by how much margin each has herefrom Washington
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Pierce County
- The growing challenges every Washington grower plans around — written at state scale, so they stay on the state guidefrom Washington
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Pierce County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Gig Harbor's 3,777 acreswhy one lot differs from the next →
- Which side of Gig Harbor you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,777 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 miles out, measured from the town centrehow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — measured at your address, and averaged away by any Gig Harbor-wide figureread your own land →
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