Merced, California, sits in USDA hardiness zone 9a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Crops well matched to these conditions include artichoke, fig, california poppy, and cabbage — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Merced, 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 Merced 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 Merced — soil, climate, flood, and parcel records. How we handle your address.
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Merced — the short answer
Merced, California: USDA zone 9a, about 318 days between hard freezes, across 15K acres of city.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 21
- Merced County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 5
- Merced County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~318
- Merced County normal — NOAA 1991–2020, nearest to this town
- City area
- 15K 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 Merced County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Merced's average, not your lot's — a low corner or a tree line moves it. Against Merced's 318-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Merced
Each reading below is measured for Merced itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsMerced runs about 318 days between hard freezes (read from Merced County, the closest normal to Merced) — 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
MeasuredMerced sits in USDA hardiness zone 9a.
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 Merced is in
Merced sits in the Central California Valley — EPA Level III, inside the wider Mediterranean California. That is read at Merced's own centroid rather than borrowed from Merced County.
What Grows in Merced
Every plant below cleared Merced's own zone 9a and its 318-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Merced?
Rarely: the season closes in stages, not all at once, and each stage has its crops. 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 21 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 5 — 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.
What's on the federal record near Merced
Closest first, within ~10 miles of Merced. Listing isn't leaking, and distance isn't exposure.
- RAZZARI FORDBrownfields · 850 ft
- MARTA LAGARESBrownfields · 1400 ft
- BURLINGTON NORTHERN AND SANTA FE RR COBrownfields · 1500 ft
- COURTESY OLDS & CAD INCBrownfields · 1500 ft
- MERCED CITY SCHOOLSBrownfields · 1600 ft
- MERCED, CA BELL STREET STATION POST OFFICEBrownfields · 1700 ft
- SHERWIN WILLIAMS STORE#8616Brownfields · 1700 ft
- Central Valley Gas Stations Atwater Partnership, LLCUnderground Storage Tanks · 1700 ft
- PACIFIC BELL TELEPHONE CO (DBA AT&T CA)Brownfields · 1800 ft
- CF MERCED DBA MERCED NURSING & REHABILITATION CENTERBrownfields · 1800 ft
- MERCED COUNTY DPW - BUILDING SERVICESBrownfields · 1800 ft
- ACCESS DENTALBrownfields · 1800 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Merced'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 Merced.
Sources Checked
within ~10 miles of Merced
Severity Distribution
within ~10 miles of Merced
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Merced, Brownfields runs higher than the national average — 607 sites within ~10 miles of Merced. 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 Merced
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 Merced average
Your land is one point inside Merced
Everything above resolves to Merced as a whole — one PHZM band, read across 15K acres, with hard-freeze dates borrowed from Merced 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 Merced Average
Merced Average
- ●USDA Zones 9a, averaged across Merced
- ●One soil character for all of Merced
- ●Frost dates read at Merced's scale: Jan 21 to Dec 5
YOUR Parcel
- ✓Your exact zone, not Merced's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Merced
Pull a site-specific report for your exact address in Merced, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Merced averages can't show:
We read public map data around Merced — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Merced average
How we know this about Merced
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 Merced 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 Merced
When does frost risk typically end in Merced?
The last hard freeze (28°F) in Merced typically lands around Jan 21, 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 11.
When is the first frost in Merced?
The first hard freeze (28°F) in Merced typically arrives around Dec 5, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 21, so the watching starts about Nov 5 — about 318 days after the spring freeze cleared.
How long is the growing season in Merced?
Measured between 28°F hard freezes, Merced sees about 318 frost-free days — roughly Jan 21 through Dec 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 11 to Nov 21, about 283 days.
Is the soil safe to grow vegetables in Merced?
The federal record around Merced is a meaningful one — 850 documented sites, mostly Brownfields entries (607), 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 Merced?
From about Nov 5 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 5 (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 5. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Merced's scale — its 9a band and its 318-day season. Your yard writes its own version of Merced'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 Merced’s own scale
5 of the readings below were taken at Merced's own scale — the 14,877 acres it covers and 850 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Merced's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 850 documented contamination sites on the federal record near Merced, the closest Brownfields record about 0.2 miles out from the town centreFederal environmental registers
- Merced's boundary and the 14,877 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~318-day seasonGrowable Ground crop-matching engine
- The ecoregion at Merced's own centroid, the Central California ValleyUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Merced has no normal of its own, so its county's is the closest measured readfrom Merced County
- Soil character — no town-scale survey exists, so Merced's 14,877 acres read through its county's SSURGO summaryfrom Merced County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Merced 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 Merced County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Merced's 14,877 acreswhy one lot differs from the next →
- Which side of Merced you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 14,877 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 Merced-wide figureread your own land →