Lemon Grove, California, sits in USDA hardiness zone 10b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Reliable performers under these conditions include avocado, meyer lemon, tomato, and artichoke; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Lemon Grove, 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 Lemon Grove 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 Lemon Grove — soil, climate, flood, and parcel records. How we handle your address.
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Lemon Grove — the short answer
Lemon Grove, California: USDA zone 10b, about 311 days between hard freezes, across 2K acres of city.
- USDA zone
- 10b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 3
- San Diego County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 11
- San Diego County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~311
- San Diego County normal — NOAA 1991–2020, nearest to this town
- City area
- 2K 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 San Diego County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 10b is Lemon Grove's average, not your lot's — a low corner or a tree line moves it. Against Lemon Grove's 311-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Lemon Grove
Each reading below is measured for Lemon Grove itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsLemon Grove runs about 311 days between hard freezes (read from San Diego County, the closest normal to Lemon Grove) — 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
MeasuredLemon Grove sits in USDA hardiness zone 10b.
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 Lemon Grove is in
Lemon Grove sits in the Southern California/Northern Baja Coast — EPA Level III, inside the wider Mediterranean California. That is read at Lemon Grove's own centroid rather than borrowed from San Diego County.
What Grows in Lemon Grove
Plants matched to Lemon Grove's USDA zones 10b, 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 Lemon Grove?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 3 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 11 — 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.
Documented around Lemon Grove
Spotted lanternfly documented 30 miles from Lemon Grove, first recorded 2022. What to watch for.
What's on the federal record near Lemon Grove
Closest first, within ~10 miles of Lemon Grove. Listing isn't leaking, and distance isn't exposure.
- LOCKMAN BODY & PAINTBrownfields · 850 ft
- SJORGEN ENGENBrownfields · 1100 ft
- ARCO 42064Underground Storage Tanks · 1200 ft
- TESORO 42064Brownfields · 1300 ft
- ECONOMIC TRANSMISSIONBrownfields · 1500 ft
- DON HENDERSON AUTOBrownfields · 1700 ft
- HENDERSON & BROWN INC DBA DON HENDERSON AUTO SERVICEBrownfields · 1700 ft
- SRSD INC DBA SYNERGY EASTBrownfields · 2000 ft
- ANNA RENDON-MORRISBrownfields · 2400 ft
- LEMON GROVE SCHOOL DISTRICTBrownfields · 2600 ft
- LETTER KRAFT PRINTINGBrownfields · 0.5 mi
- PROFESSIONAL MOBILE BUMPERBrownfields · 0.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Lemon Grove'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 Lemon Grove.
Total Sites
7,737
within ~10 miles of Lemon Grove
Risk Level
Elevated
Highest-severity
20 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Lemon Grove
Severity Distribution
within ~10 miles of Lemon Grove
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Lemon Grove, Brownfields runs higher than the national average — 6,989 sites within ~10 miles of Lemon Grove. 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 Lemon Grove
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 Lemon Grove average
Your land is one point inside Lemon Grove
Everything above resolves to Lemon Grove as a whole — one PHZM band, read across 2K acres, with hard-freeze dates borrowed from San Diego County’s record because no 30-year normal resolves at this city’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 city 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 Lemon Grove Average
Lemon Grove Average
- ●USDA Zones 10b, averaged across Lemon Grove
- ●One soil character for all of Lemon Grove
- ●Frost dates read at Lemon Grove's scale: Feb 3 to Dec 11
YOUR Parcel
- ✓Your exact zone, not Lemon Grove's 10b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Lemon Grove
Pull a site-specific report for your exact address in Lemon Grove, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Lemon Grove averages can't show:
We read public map data around Lemon Grove — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Lemon Grove average
How we know this about Lemon Grove
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at San Diego 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 city grain anywhere on this page — there is no city-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 Lemon Grove
When does frost risk typically end in Lemon Grove?
The last hard freeze (28°F) in Lemon Grove typically lands around Feb 3, 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 24.
When is the first frost in Lemon Grove?
The first hard freeze (28°F) in Lemon Grove typically arrives around Dec 11, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 27, so the watching starts about Nov 11 — about 311 days after the spring freeze cleared.
How long is the growing season in Lemon Grove?
Measured between 28°F hard freezes, Lemon Grove sees about 311 frost-free days — roughly Feb 3 through Dec 11, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 24 to Nov 27, about 276 days.
Is the soil safe to grow vegetables in Lemon Grove?
The federal record around Lemon Grove is a meaningful one — 7,737 documented sites, mostly Brownfields entries (6,989), 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 Lemon Grove?
From about Nov 11 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 11 (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 11. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Lemon Grove's scale — its 10b band and its 311-day season. Your yard writes its own version of Lemon Grove'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 Lemon Grove’s own scale
5 of the readings below were taken at Lemon Grove's own scale — the 2,483 acres it covers and 7,737 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Lemon Grove's own USDA hardiness band, zones 10bUSDA PHZM 2023
- 7,737 documented contamination sites on the federal record near Lemon Grove, the closest Brownfields record about 0.2 miles out from the town centreFederal environmental registers
- Lemon Grove's boundary and the 2,483 acres inside itUS Census TIGER/Line 2025
- The ecoregion at Lemon Grove's own centroid, the Southern California/Northern Baja CoastUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Lemon Grovelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Lemon Grove has no normal of its own, so its county's is the closest measured readfrom San Diego County
- Soil character — no town-scale survey exists, so Lemon Grove's 2,483 acres read through its county's SSURGO summaryfrom San Diego 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 San Diego 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 San Diego County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Lemon Grove's 2,483 acreswhy one lot differs from the next →
- Which side of Lemon Grove you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,483 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 Lemon Grove-wide figureread your own land →
More in California
Wider growing context
What grows across CaliforniaLemon Grove sits outside our named growing regions, so California as a whole is its closest context here.
Nearby growing guides