Sierra Brooks, 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.
Reliable performers under these conditions include cabbage, blackberry, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Sierra Brooks, 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 Sierra Brooks 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 Sierra Brooks — soil, climate, flood, and parcel records. How we handle your address.
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Sierra Brooks — the short answer
Sierra Brooks, California: USDA zone 6b, about 139 days between hard freezes, across 877 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 20
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~139
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 877 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 Sierra Brooks's average, not your lot's — a low corner or a tree line moves it. Against Sierra Brooks's 139-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Sierra Brooks
Each reading below is measured for Sierra Brooks itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSierra Brooks runs about 139 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
MeasuredSierra Brooks 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 Sierra Brooks is in
Sierra Brooks sits in the Central Basin and Range — EPA Level III, inside the wider North American Deserts. That is read at Sierra Brooks's own centroid, and it is not what its county reads: Sierra County is mostly Sierra Nevada. The wider page above you is answering a different question about different ground.
What Grows in Sierra Brooks
Every plant below cleared Sierra Brooks's own zone 6b and its 139-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Sierra Brooks?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Apr 22; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 20 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 6 — 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 Sierra Brooks
Closest first, within ~10 miles of Sierra Brooks. Listing isn't leaking, and distance isn't exposure.
- COUNTY OF SIERRA DEPT OF PUBLIC WORKSBrownfields · 2.1 mi
- SIERRA PACIFIC INDUSTRIESBrownfields · 2.5 mi
- SIERRA PACIFIC INDUSTRIESToxics Release Inventory · 2.5 mi
- ARP LOYALTON COGEN LLCBrownfields · 2.5 mi
- DOHS SIERRA COUNTYBrownfields · 2.6 mi
- White's Sierra StationUnderground Storage Tanks · 2.7 mi
- WHITE'S SIERRA STATION INCBrownfields · 2.7 mi
- PACIFIC BELLBrownfields · 2.8 mi
- FMR SMITHNECK COUNTRY STOREBrownfields · 2.8 mi
- Sierra EnergyUnderground Storage Tanks · 2.9 mi
- LOYALTON BULKPLANTBrownfields · 2.9 mi
- Antelope Neck MineMining · 4.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Sierra Brooks'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 Sierra Brooks.
Total Sites
29
within ~10 miles of Sierra Brooks
Risk Level
Low
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Sierra Brooks
Severity Distribution
within ~10 miles of Sierra Brooks
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Sierra Brooks, two things run higher than the national average within ~10 miles of Sierra Brooks — Mining (9 sites) and Brownfields (16 sites). That's not a problem with your land — it's information about it.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Sierra Brooks
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 Sierra Brooks average
Your land is one point inside Sierra Brooks
Everything above resolves to Sierra Brooks as a whole — one PHZM band and one 28°F frost record, read across 877 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 Sierra Brooks Average
Sierra Brooks Average
- ●USDA Zones 6b, averaged across Sierra Brooks
- ●One soil character for all of Sierra Brooks
- ●Frost dates read at Sierra Brooks's scale: May 20 to Oct 6
YOUR Parcel
- ✓Your exact zone, not Sierra Brooks's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Sierra Brooks
Pull a site-specific report for your exact address in Sierra Brooks, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Sierra Brooks averages can't show:
We read public map data around Sierra Brooks — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Sierra Brooks average
How we know this about Sierra Brooks
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 Sierra Brooks’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 Sierra Brooks
When does frost risk typically end in Sierra Brooks?
The last hard freeze (28°F) in Sierra Brooks typically lands around May 20, 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 10.
When is the first frost in Sierra Brooks?
The first hard freeze (28°F) in Sierra Brooks typically arrives around Oct 6, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 22, so the watching starts about Sep 6 — about 139 days after the spring freeze cleared.
How long is the growing season in Sierra Brooks?
Measured between 28°F hard freezes, Sierra Brooks sees about 139 frost-free days — roughly May 20 through Oct 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 10 to Sep 22, about 104 days.
Is the soil safe to grow vegetables in Sierra Brooks?
The federal record around Sierra Brooks is light — 29 documented sites across the 9 federal source types we checked, mostly Brownfields entries (16), the nearest Brownfields record about 2.1 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do gardeners stretch the season in Sierra Brooks?
With about 139 frost-free days between hard freezes, Sierra Brooks 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 167 to 195 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 20 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Sierra Brooks's scale — its 6b band and its 139-day season. Your yard writes its own version of Sierra Brooks'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 Sierra Brooks’s own scale
6 of the readings below were taken at Sierra Brooks's own scale — its own ~139-day season between 28°F freezes, the 877 acres it covers and 29 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Sierra Brooks's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Sierra Brooks's own 28°F hard-freeze dates, about May 20 and Oct 6 and the ~139-day span between themNOAA 1991–2020 Climate Normals
- 29 documented contamination sites on the federal record near Sierra Brooks, the closest Brownfields record about 2.1 miles out from the town centreFederal environmental registers
- Sierra Brooks's boundary and the 877 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~139-day seasonGrowable Ground crop-matching engine
- Sierra Brooks sits in the Central Basin and Range — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Sierra Brooks's 877 acres read through its county's SSURGO summaryfrom Sierra County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Sierra 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 Sierra County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Sierra Brooks's 877 acreswhy one lot differs from the next →
- Which side of Sierra Brooks you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 877 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 2.1 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 Sierra Brooks-wide figureread your own land →
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