Jeffers Gardens, Oregon, sits in USDA hardiness zone 9a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
The conditions favor kale, douglas fir, garlic, and hazelnut, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Jeffers Gardens, 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 Jeffers Gardens 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 Jeffers Gardens — soil, climate, flood, and parcel records. How we handle your address.
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Jeffers Gardens — the short answer
Jeffers Gardens, Oregon: USDA zone 9a, about 263 days between hard freezes, across 362 acres of town.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 4
- Clatsop County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 22
- Clatsop County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~263
- Clatsop County normal — NOAA 1991–2020, nearest to this town
- Town area
- 362 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 Clatsop County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Jeffers Gardens's average, not your lot's — a low corner or a tree line moves it. Against Jeffers Gardens's 263-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Jeffers Gardens
Each reading below is measured for Jeffers Gardens itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsJeffers Gardens runs about 263 days between hard freezes (read from Clatsop County, the closest normal to Jeffers Gardens) — 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
MeasuredJeffers Gardens 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 Jeffers Gardens is in
Jeffers Gardens sits in the Coast Range — EPA Level III, inside the wider Marine West Coast Forest. That is read at Jeffers Gardens's own centroid rather than borrowed from Clatsop County.
What Grows in Jeffers Gardens
Plants matched to Jeffers Gardens'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 Jeffers Gardens?
Rarely: the season closes in stages, not all at once, and each stage has its crops. 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 22 — long-season crops need about 90 days of runway, quick greens only 30. Here the calendar nearly circles: cool-season crops take the winter shift, and the next window is always close.
What's on the federal record near Jeffers Gardens
Closest first, within ~10 miles of Jeffers Gardens. Listing isn't leaking, and distance isn't exposure.
- OGLIVIE COMPANY INC THEBrownfields · 700 ft
- AFBM, LLCUnderground Storage Tanks · 1900 ft
- ASTORIA MARINE CONSTRUCTION COUnderground Storage Tanks · 0.6 mi
- LANDWEHR'SUnderground Storage Tanks · 0.6 mi
- ASTORIA MARINE CONSTRUCTION COMPANYSuperfund · 0.6 mi
- TRAILS END RECOVERYUnderground Storage Tanks · 1.2 mi
- CLASSIC BODYWORKSUnderground Storage Tanks · 1.3 mi
- PORT OF ASTORIA AIRPORT UST'SUnderground Storage Tanks · 1.4 mi
- LEKTRO INCBrownfields · 1.4 mi
- USCG ASTORIA AIR STATIONBrownfields · 1.5 mi
- USCG ASTORIA AIR STATIONToxics Release Inventory · 1.5 mi
- COAST GUARD EXCHANGE ASTORIAUnderground Storage Tanks · 1.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Jeffers Gardens'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 Jeffers Gardens.
Total Sites
175
within ~10 miles of Jeffers Gardens
Risk Level
Elevated
Highest-severity
5 Superfund sites
Sources Checked
within ~10 miles of Jeffers Gardens
Severity Distribution
within ~10 miles of Jeffers Gardens
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Jeffers Gardens, two things run higher than the national average within ~10 miles of Jeffers Gardens — Superfund (5 sites) and Underground Storage Tanks (121 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 Jeffers Gardens
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 Jeffers Gardens average
Your land is one point inside Jeffers Gardens
Everything above resolves to Jeffers Gardens as a whole — one PHZM band, read across 362 acres, with hard-freeze dates borrowed from Clatsop County’s record because no 30-year normal resolves at this town’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 town 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 Jeffers Gardens Average
Jeffers Gardens Average
- ●USDA Zones 9a, averaged across Jeffers Gardens
- ●One soil character for all of Jeffers Gardens
- ●Frost dates read at Jeffers Gardens's scale: Mar 4 to Nov 22
YOUR Parcel
- ✓Your exact zone, not Jeffers Gardens's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Jeffers Gardens
Pull a site-specific report for your exact address in Jeffers Gardens, Oregon — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Jeffers Gardens averages can't show:
We read public map data around Jeffers Gardens — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Jeffers Gardens average
How we know this about Jeffers Gardens
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Clatsop 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 town grain anywhere on this page — there is no town-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 Jeffers Gardens
When does frost risk typically end in Jeffers Gardens?
The last hard freeze (28°F) in Jeffers Gardens 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 Jeffers Gardens?
The first hard freeze (28°F) in Jeffers Gardens typically arrives around Nov 22, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 8, so the watching starts about Oct 23 — about 263 days after the spring freeze cleared.
How long is the growing season in Jeffers Gardens?
Measured between 28°F hard freezes, Jeffers Gardens sees about 263 frost-free days — roughly Mar 4 through Nov 22, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 25 to Nov 8, about 228 days.
Is the soil safe to grow vegetables in Jeffers Gardens?
The federal record around Jeffers Gardens is a meaningful one — 175 documented sites, mostly Underground Storage Tanks entries (121), the nearest Brownfields record about 0.1 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 Jeffers Gardens?
From about Oct 23 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 22 (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 22. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Jeffers Gardens's scale — its 9a band and its 263-day season. Your yard writes its own version of Jeffers Gardens'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 Jeffers Gardens’s own scale
4 of the readings below were taken at Jeffers Gardens's own scale — the 362 acres it covers and 175 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Jeffers Gardens's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 175 documented contamination sites on the federal record near Jeffers Gardens, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- Jeffers Gardens's boundary and the 362 acres inside itUS Census TIGER/Line 2025
- The ecoregion at Jeffers Gardens's own centroid, the Coast RangeUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Jeffers Gardens has no normal of its own, so its county's is the closest measured readfrom Clatsop County
- Soil character — no town-scale survey exists, so Jeffers Gardens's 362 acres read through its county's SSURGO summaryfrom Clatsop County
- The candidate plant list — Oregon's curated set, filtered to this zone band and re-ordered by how much margin each has herefrom Oregon
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Clatsop County
- The growing challenges every Oregon grower plans around — written at state scale, so they stay on the state guidefrom Oregon
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Clatsop County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Jeffers Gardens's 362 acreswhy one lot differs from the next →
- Which side of Jeffers Gardens you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 362 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.1 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 Jeffers Gardens-wide figureread your own land →