Silverado Resort, California, sits in USDA hardiness zone 9b — 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 okra, meyer lemon, california poppy, and artichoke; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Silverado Resort, 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 Silverado Resort 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 Silverado Resort — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Silverado Resort — the short answer
Silverado Resort, California: USDA zone 9b, about 327 days between hard freezes, across 1K acres of town.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 23
- Napa County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 16
- Napa County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~327
- Napa County normal — NOAA 1991–2020, nearest to this town
- Town area
- 1K 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 Napa County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Silverado Resort's average, not your lot's — a low corner or a tree line moves it. Against Silverado Resort's 327-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Silverado Resort
Each reading below is measured for Silverado Resort itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSilverado Resort runs about 327 days between hard freezes (read from Napa County, the closest normal to Silverado Resort) — 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
MeasuredSilverado Resort 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 Silverado Resort is in
Silverado Resort sits in the Central California Foothills and Coastal Mountains — EPA Level III, inside the wider Mediterranean California. That is read at Silverado Resort's own centroid rather than borrowed from Napa County.
What Grows in Silverado Resort
Every plant below cleared Silverado Resort's own zone 9b and its 327-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Silverado Resort?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. 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 23 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 16 — 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 Silverado Resort
Closest first, within ~10 miles of Silverado Resort. Listing isn't leaking, and distance isn't exposure.
- CITY OF NAPA MILLIKEN TANKBrownfields · 850 ft
- GENE & CAROLE NELSONBrownfields · 1400 ft
- RBL NAPA, LLC BY RAWSON, BLUM & LEONBrownfields · 0.5 mi
- WILLIAM HILL ESTATE WINERYBrownfields · 0.7 mi
- SILVERADO COUNTRY CLUB & RESORTBrownfields · 0.8 mi
- WASTE ABATEMENT RESOURCES INCBrownfields · 0.9 mi
- 006N004W23Q003MNitrate · 0.9 mi
- VALLEY LIQUOR & GASBrownfields · 1.3 mi
- VALLEY LIQUORSUnderground Storage Tanks · 1.3 mi
- RAWAH VINEYARDS SODA CANYON RANCHBrownfields · 1.3 mi
- REFINISHING REVOLUTIONBrownfields · 1.3 mi
- CALIFORNIA DEPT OF FORESTRY&FIRE PROTECTIONBrownfields · 1.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Silverado Resort'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 Silverado Resort.
Total Sites
613
within ~10 miles of Silverado Resort
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Silverado Resort
Severity Distribution
within ~10 miles of Silverado Resort
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Silverado Resort, Brownfields runs higher than the national average — 499 sites within ~10 miles of Silverado Resort. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Silverado Resort
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 Silverado Resort average
Your land is one point inside Silverado Resort
Everything above resolves to Silverado Resort as a whole — one PHZM band, read across 1K acres, with hard-freeze dates borrowed from Napa 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 Silverado Resort Average
Silverado Resort Average
- ●USDA Zones 9b, averaged across Silverado Resort
- ●One soil character for all of Silverado Resort
- ●Frost dates read at Silverado Resort's scale: Jan 23 to Dec 16
YOUR Parcel
- ✓Your exact zone, not Silverado Resort's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Silverado Resort
Pull a site-specific report for your exact address in Silverado Resort, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Silverado Resort averages can't show:
We read public map data around Silverado Resort — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Silverado Resort average
How we know this about Silverado Resort
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 Napa 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 Silverado Resort
When does frost risk typically end in Silverado Resort?
The last hard freeze (28°F) in Silverado Resort typically lands around Jan 23, 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 13.
When is the first frost in Silverado Resort?
The first hard freeze (28°F) in Silverado Resort typically arrives around Dec 16, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Dec 2, so the watching starts about Nov 16 — about 327 days after the spring freeze cleared.
How long is the growing season in Silverado Resort?
Measured between 28°F hard freezes, Silverado Resort sees about 327 frost-free days — roughly Jan 23 through Dec 16, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 13 to Dec 2, about 292 days.
Is the soil safe to grow vegetables in Silverado Resort?
The federal record around Silverado Resort is a meaningful one — 613 documented sites, mostly Brownfields entries (499), 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 Silverado Resort?
From about Nov 16 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 16 (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 16. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Silverado Resort's scale — its 9b band and its 327-day season. Your yard writes its own version of Silverado Resort'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 Silverado Resort’s own scale
5 of the readings below were taken at Silverado Resort's own scale — the 1,210 acres it covers and 613 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Silverado Resort's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 613 documented contamination sites on the federal record near Silverado Resort, the closest Brownfields record about 0.2 miles out from the town centreFederal environmental registers
- Silverado Resort's boundary and the 1,210 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~327-day seasonGrowable Ground crop-matching engine
- The ecoregion at Silverado Resort's own centroid, the Central California Foothills and Coastal MountainsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Silverado Resort has no normal of its own, so its county's is the closest measured readfrom Napa County
- Soil character — no town-scale survey exists, so Silverado Resort's 1,210 acres read through its county's SSURGO summaryfrom Napa County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Napa 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 Napa County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Silverado Resort's 1,210 acreswhy one lot differs from the next →
- Which side of Silverado Resort you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,210 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 Silverado Resort-wide figureread your own land →
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Growing region
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