Bay Point, California, sits in USDA hardiness zone 9b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Expect okra, meyer lemon, california poppy, and artichoke to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Bay Point, 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 Bay Point 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 Bay Point — soil, climate, flood, and parcel records. How we handle your address.
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Bay Point — the short answer
Bay Point, California: USDA zone 9b, about 332 days between hard freezes, across 4K acres of town.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 16
- Contra Costa County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 14
- Contra Costa County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~332
- Contra Costa County normal — NOAA 1991–2020, nearest to this town
- Town 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 Contra Costa County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Bay Point's average, not your lot's — a low corner or a tree line moves it. Against Bay Point's 332-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Bay Point
Each reading below is measured for Bay Point itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsBay Point runs about 332 days between hard freezes (read from Contra Costa County, the closest normal to Bay Point) — 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
MeasuredBay Point sits in USDA hardiness zone 9b.
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 Bay Point is in
Bay Point sits in the Central California Foothills and Coastal Mountains — EPA Level III, inside the wider Mediterranean California. That is read at Bay Point's own centroid rather than borrowed from Contra Costa County.
What Grows in Bay Point
Every plant below cleared Bay Point's own zone 9b and its 332-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Bay Point?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Jan 16 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 14 — long-season crops need about 90 days of runway, quick greens only 30. In a climate this gentle, “too late” hardly applies — the question becomes which crops prefer the cooler months ahead.
Documented around Bay Point
Spotted lanternfly documented 25 miles from Bay Point, first recorded 2023. What to watch for.
What's on the federal record near Bay Point
Closest first, within ~10 miles of Bay Point. Listing isn't leaking, and distance isn't exposure.
- BAY POINT AUTO REPAIRBrownfields · 850 ft
- MARTHA HAROBrownfields · 1000 ft
- RIVERVIEW MIDDLE SCHOOLBrownfields · 1400 ft
- CONTRA COSTA COUNTY-BAY POINT FAMILY HEALTH CENTERBrownfields · 1400 ft
- ACME PACKAGINGToxics Release Inventory · 1400 ft
- 7-ELEVEN INC #16693Underground Storage Tanks · 1400 ft
- ANGLEBOARDBrownfields · 1500 ft
- BETO LIMONS GRADING & CONSTRUCTIONBrownfields · 2000 ft
- HARRIS YACHT HARBORBrownfields · 2200 ft
- CORD ELECTRIC MOTOR CORPBrownfields · 2200 ft
- H&S Energy Products,#3045Underground Storage Tanks · 2400 ft
- PACIFIC BELLBrownfields · 2400 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Bay Point'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 Bay Point.
Sources Checked
within ~10 miles of Bay Point
Severity Distribution
within ~10 miles of Bay Point
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Bay Point, Brownfields runs higher than the national average — 2,417 sites within ~10 miles of Bay Point. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Bay Point
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 Bay Point average
Your land is one point inside Bay Point
Everything above resolves to Bay Point as a whole — one PHZM band, read across 4K acres, with hard-freeze dates borrowed from Contra Costa 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 Bay Point Average
Bay Point Average
- ●USDA Zones 9b, averaged across Bay Point
- ●One soil character for all of Bay Point
- ●Frost dates read at Bay Point's scale: Jan 16 to Dec 14
YOUR Parcel
- ✓Your exact zone, not Bay Point's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Bay Point
Pull a site-specific report for your exact address in Bay Point, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Bay Point averages can't show:
We read public map data around Bay Point — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Bay Point average
How we know this about Bay Point
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 Contra Costa 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 Bay Point
When does frost risk typically end in Bay Point?
The last hard freeze (28°F) in Bay Point typically lands around Jan 16, 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 Feb 6.
When is the first frost in Bay Point?
The first hard freeze (28°F) in Bay Point typically arrives around Dec 14, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 30, so the watching starts about Nov 14 — about 332 days after the spring freeze cleared.
How long is the growing season in Bay Point?
Measured between 28°F hard freezes, Bay Point sees about 332 frost-free days — roughly Jan 16 through Dec 14, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 6 to Nov 30, about 297 days.
Is the soil safe to grow vegetables in Bay Point?
The federal record around Bay Point is a meaningful one — 2,682 documented sites, mostly Brownfields entries (2,417), the nearest Brownfields 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 Bay Point?
From about Nov 14 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 Dec 14 (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 Dec 14. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Bay Point's scale — its 9b band and its 332-day season. Your yard writes its own version of Bay Point'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 Bay Point’s own scale
6 of the readings below were taken at Bay Point's own scale — the 4,113 acres it covers and 2,682 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Bay Point's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 2,682 documented contamination sites on the federal record near Bay Point, the closest Brownfields record about 0.2 miles out from the town centreFederal environmental registers
- Bay Point's boundary and the 4,113 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~332-day seasonGrowable Ground crop-matching engine
- The ecoregion at Bay Point's own centroid, the Central California Foothills and Coastal MountainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Bay Pointlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Bay Point has no normal of its own, so its county's is the closest measured readfrom Contra Costa County
- Soil character — no town-scale survey exists, so Bay Point's 4,113 acres read through its county's SSURGO summaryfrom Contra Costa County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Contra Costa 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 Contra Costa County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Bay Point's 4,113 acreswhy one lot differs from the next →
- Which side of Bay Point you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,113 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Bay Point-wide figureread your own land →