London, California, sits in USDA hardiness zone 9b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Crops well matched to these conditions include tomato, artichoke, fig, and california poppy — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in London, 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 London 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 London — soil, climate, flood, and parcel records. How we handle your address.
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London — the short answer
London, California: USDA zone 9b, about 296 days between hard freezes, across 523 acres of town.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 17
- Tulare County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 10
- Tulare County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~296
- Tulare County normal — NOAA 1991–2020, nearest to this town
- Town area
- 523 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 Tulare County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is London's average, not your lot's — a low corner or a tree line moves it. Against London's 296-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in London
Each reading below is measured for London itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsLondon runs about 296 days between hard freezes (read from Tulare County, the closest normal to London) — 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
MeasuredLondon 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 London is in
London sits in the Central California Valley — EPA Level III, inside the wider Mediterranean California. That is read at London's own centroid, and it is not what its county reads: Tulare County is mostly Sierra Nevada. The wider page above you is answering a different question about different ground.
What Grows in London
Plants matched to London's USDA zones 9b, 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 London?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 17 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 10 — long-season crops need about 90 days of runway, quick greens only 30. With almost year-round growing weather, timing is about heat and rainfall more than frost — some bench is always in play.
What's on the federal record near London
Closest first, within ~10 miles of London. Listing isn't leaking, and distance isn't exposure.
- CALIFORNIA CONTROLLED ATMOSPHEREBrownfields · 1.4 mi
- FRUIT PATCH INCBrownfields · 1.6 mi
- Z.M.C. FRESHBrownfields · 1.7 mi
- SUNWESTBrownfields · 1.8 mi
- YNT HARVESTINGBrownfields · 2.1 mi
- ZIMMERMAN FARMS INCBrownfields · 2.3 mi
- BELKNAP PUMP CO INCBrownfields · 2.4 mi
- CALIFORNIA GROWERS LLCBrownfields · 2.4 mi
- H & H TIRE #1Brownfields · 2.5 mi
- 017S023E16B001MNitrate · 2.6 mi
- RIJLAARSDAM RANCHBrownfields · 2.7 mi
- GREAT AMERICAN HARVESTING INCBrownfields · 2.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from London'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 London.
Total Sites
679
within ~10 miles of London
Risk Level
Elevated
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of London
Severity Distribution
within ~10 miles of London
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around London, Brownfields runs higher than the national average — 515 sites within ~10 miles of London. 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 London
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 London average
Your land is one point inside London
Everything above resolves to London as a whole — one PHZM band, read across 523 acres, with hard-freeze dates borrowed from Tulare 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 London Average
London Average
- ●USDA Zones 9b, averaged across London
- ●One soil character for all of London
- ●Frost dates read at London's scale: Feb 17 to Dec 10
YOUR Parcel
- ✓Your exact zone, not London's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in London
Pull a site-specific report for your exact address in London, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that London averages can't show:
We read public map data around London — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the London average
How we know this about London
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 Tulare 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 London
When does frost risk typically end in London?
The last hard freeze (28°F) in London typically lands around Feb 17, 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 10.
When is the first frost in London?
The first hard freeze (28°F) in London typically arrives around Dec 10, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 26, so the watching starts about Nov 10 — about 296 days after the spring freeze cleared.
How long is the growing season in London?
Measured between 28°F hard freezes, London sees about 296 frost-free days — roughly Feb 17 through Dec 10, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 10 to Nov 26, about 261 days.
Is the soil safe to grow vegetables in London?
The federal record around London is a meaningful one — 679 documented sites, mostly Brownfields entries (515), the nearest Brownfields record about 1.4 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 London?
From about Nov 10 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 10 (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 10. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at London's scale — its 9b band and its 296-day season. Your yard writes its own version of London'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 London’s own scale
4 of the readings below were taken at London's own scale — the 523 acres it covers and 679 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- London's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 679 documented contamination sites on the federal record near London, the closest Brownfields record about 1.4 miles out from the town centreFederal environmental registers
- London's boundary and the 523 acres inside itUS Census TIGER/Line 2025
- London sits in the Central California Valley — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — London has no normal of its own, so its county's is the closest measured readfrom Tulare County
- Soil character — no town-scale survey exists, so London's 523 acres read through its county's SSURGO summaryfrom Tulare County
- The candidate plant list — California's curated set, filtered to this zone band and re-ordered by how much margin each has herefrom California
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Tulare 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 Tulare County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among London's 523 acreswhy one lot differs from the next →
- Which side of London you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 523 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 1.4 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 London-wide figureread your own land →
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