Delleker, California, sits in USDA hardiness zone 6b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Expect cabbage, blackberry, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Delleker, 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 Delleker 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 Delleker — soil, climate, flood, and parcel records. How we handle your address.
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Delleker — the short answer
Delleker, California: USDA zone 6b, about 138 days between hard freezes, across 2K acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~138
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 2K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 6b is Delleker's average, not your lot's — a low corner or a tree line moves it. Against Delleker's 138-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Delleker
Each reading below is measured for Delleker itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredDelleker runs about 138 days between hard freezes — a short growing season.
Long-maturing crops like melons, sweet potatoes, and winter squash can run out of runway before the first hard freeze, ripening late or not at all.
Lead with fast-maturing varieties, and stretch the season on both ends with cold frames, low tunnels, or a greenhouse.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredDelleker sits in USDA hardiness zone 6b.
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 Delleker is in
Delleker sits in the Sierra Nevada — EPA Level III, inside the wider Northwestern Forested Mountains. That is read at Delleker's own centroid rather than borrowed from Plumas County.
What Grows in Delleker
Every plant below cleared Delleker's own zone 6b and its 138-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Delleker?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Apr 21; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 19 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 4 — long-season crops need about 90 days of runway, quick greens only 30. In a season this compact, fast finishers and cold-hardy greens do the late work, and garlic tucked in before the freeze repays you next summer.
What's on the federal record near Delleker
Closest first, within ~10 miles of Delleker. Listing isn't leaking, and distance isn't exposure.
- WHITE CAP READY MIX INCBrownfields · 0.6 mi
- HUNT & SONS LLCBrownfields · 0.6 mi
- PHIL ALLEGRIBrownfields · 0.7 mi
- PORTOLA SENIOR LPBrownfields · 0.7 mi
- COATES INC DBA COATES TIRE CENTER ALSO LES SCHWAB TIRE CENTERBrownfields · 0.8 mi
- DAVID LEE HUMPHREY/DBA CRESCENT TOWBrownfields · 0.8 mi
- RIGGS & SMITH ENTERPRISES INC DBA SIERRA GARAGEBrownfields · 0.8 mi
- 023N013E34Q001MNitrate · 0.8 mi
- PORTOLA AUTOMOTIVEBrownfields · 0.8 mi
- DOLLAR GENERAL #16097Brownfields · 0.9 mi
- PLUMAS COUNTY - PUBLIC WORKSBrownfields · 0.9 mi
- TROY'S AUTOMOTIVE SERVICEBrownfields · 0.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Delleker'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 Delleker.
Sources Checked
within ~10 miles of Delleker
Severity Distribution
within ~10 miles of Delleker
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Delleker, Brownfields runs higher than the national average — 42 sites within ~10 miles of Delleker. That's not a problem with your land — it's information about it.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Delleker
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 Delleker average
Your land is one point inside Delleker
Everything above resolves to Delleker as a whole — one PHZM band and one 28°F frost record, read across 2K acres. 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 Delleker Average
Delleker Average
- ●USDA Zones 6b, averaged across Delleker
- ●One soil character for all of Delleker
- ●Frost dates read at Delleker's scale: May 19 to Oct 4
YOUR Parcel
- ✓Your exact zone, not Delleker's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Delleker
Pull a site-specific report for your exact address in Delleker, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Delleker averages can't show:
We read public map data around Delleker — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Delleker average
How we know this about Delleker
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 Delleker’s own record; 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 Delleker
When does frost risk typically end in Delleker?
The last hard freeze (28°F) in Delleker typically lands around May 19, 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 Jun 9.
When is the first frost in Delleker?
The first hard freeze (28°F) in Delleker typically arrives around Oct 4, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 20, so the watching starts about Sep 4 — about 138 days after the spring freeze cleared.
How long is the growing season in Delleker?
Measured between 28°F hard freezes, Delleker sees about 138 frost-free days — roughly May 19 through Oct 4, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 9 to Sep 20, about 103 days.
Is the soil safe to grow vegetables in Delleker?
The federal record around Delleker shows 52 documented sites, mostly Brownfields entries (42), the nearest Brownfields record about 0.6 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do gardeners stretch the season in Delleker?
With about 138 frost-free days between hard freezes, Delleker rewards the classic extension moves: floating row cover buys roughly two to four extra weeks at each shoulder — on this season that is a working window nearer 166 to 194 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 19 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Delleker's scale — its 6b band and its 138-day season. Your yard writes its own version of Delleker'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 Delleker’s own scale
6 of the readings below were taken at Delleker's own scale — its own ~138-day season between 28°F freezes, the 1,770 acres it covers and 52 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Delleker's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Delleker's own 28°F hard-freeze dates, about May 19 and Oct 4 and the ~138-day span between themNOAA 1991–2020 Climate Normals
- 52 documented contamination sites on the federal record near Delleker, the closest Brownfields record about 0.6 miles out from the town centreFederal environmental registers
- Delleker's boundary and the 1,770 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~138-day seasonGrowable Ground crop-matching engine
- The ecoregion at Delleker's own centroid, the Sierra NevadaUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Delleker's 1,770 acres read through its county's SSURGO summaryfrom Plumas County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Plumas County
- The growing challenges every California grower plans around — written at state scale, so they stay on the state guidefrom California
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Plumas County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Delleker's 1,770 acreswhy one lot differs from the next →
- Which side of Delleker you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,770 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.6 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 Delleker-wide figureread your own land →