Hydesville, California, sits in USDA hardiness zone 9b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Growers here do well with okra, meyer lemon, california poppy, and artichoke — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Hydesville, 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 Hydesville 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 Hydesville — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Hydesville — the short answer
Hydesville, California: USDA zone 9b, about 278 days between hard freezes, across 5K acres of town.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 1
- Humboldt County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 4
- Humboldt County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~278
- Humboldt County normal — NOAA 1991–2020, nearest to this town
- Town area
- 5K 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 Humboldt County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Hydesville's average, not your lot's — a low corner or a tree line moves it. Against Hydesville's 278-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hydesville
Each reading below is measured for Hydesville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsHydesville runs about 278 days between hard freezes (read from Humboldt County, the closest normal to Hydesville) — 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
MeasuredHydesville 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 Hydesville is in
Hydesville sits in the Coast Range — EPA Level III, inside the wider Marine West Coast Forest. That is read at Hydesville's own centroid rather than borrowed from Humboldt County.
What Grows in Hydesville
Every plant below cleared Hydesville's own zone 9b and its 278-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Hydesville?
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 Feb 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 1 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 4 — long-season crops need about 90 days of runway, quick greens only 30. Here the calendar nearly circles: cool-season crops take the winter shift, and the next window is always close.
What's on the federal record near Hydesville
Closest first, within ~10 miles of Hydesville. Listing isn't leaking, and distance isn't exposure.
- Murrish's Hydesville Market - Gasoline StationUnderground Storage Tanks · 1.0 mi
- 002N001E21G002HNitrate · 1.2 mi
- HUMBOLDT REDWOOD CO LLCBrownfields · 1.4 mi
- REDWOOD EMPIRE GOLF & COUNTRY CLUBBrownfields · 1.5 mi
- 002N001E07Q001HNitrate · 1.6 mi
- STEVE WILLS TRUCKING & LOGGING LLCBrownfields · 2.1 mi
- THOMAS R. BESS - ASPHALT SAND & GRAVELBrownfields · 2.2 mi
- STEVE WILLS TRUCKINGBrownfields · 2.3 mi
- FORTUNA, CITY OFPFAS · 2.4 mi
- ROHNERVILLE AIRPORTBrownfields · 2.4 mi
- Humboldt County Aviation Dept - Rohnerville AirportUnderground Storage Tanks · 2.4 mi
- KEN BAREILLES TRUCKINGBrownfields · 2.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hydesville'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 Hydesville.
Total Sites
184
within ~10 miles of Hydesville
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Hydesville
Severity Distribution
within ~10 miles of Hydesville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hydesville, two things run higher than the national average within ~10 miles of Hydesville — CAFO (8 sites) and Brownfields (135 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Hydesville
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 Hydesville average
Your land is one point inside Hydesville
Everything above resolves to Hydesville as a whole — one PHZM band, read across 5K acres, with hard-freeze dates borrowed from Humboldt 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 Hydesville Average
Hydesville Average
- ●USDA Zones 9b, averaged across Hydesville
- ●One soil character for all of Hydesville
- ●Frost dates read at Hydesville's scale: Mar 1 to Dec 4
YOUR Parcel
- ✓Your exact zone, not Hydesville's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hydesville
Pull a site-specific report for your exact address in Hydesville, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hydesville averages can't show:
We read public map data around Hydesville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hydesville average
How we know this about Hydesville
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 Humboldt 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 Hydesville
When does frost risk typically end in Hydesville?
The last hard freeze (28°F) in Hydesville typically lands around Mar 1, 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 22.
When is the first frost in Hydesville?
The first hard freeze (28°F) in Hydesville typically arrives around Dec 4, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 20, so the watching starts about Nov 4 — about 278 days after the spring freeze cleared.
How long is the growing season in Hydesville?
Measured between 28°F hard freezes, Hydesville sees about 278 frost-free days — roughly Mar 1 through Dec 4, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 22 to Nov 20, about 243 days.
Is the soil safe to grow vegetables in Hydesville?
The federal record around Hydesville is a meaningful one — 184 documented sites, mostly Brownfields entries (135), the nearest Underground Storage Tanks record about 1.0 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 Hydesville?
From about Nov 4 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 4 (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 4. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Hydesville's scale — its 9b band and its 278-day season. Your yard writes its own version of Hydesville'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 Hydesville’s own scale
5 of the readings below were taken at Hydesville's own scale — the 4,800 acres it covers and 184 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Hydesville's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 184 documented contamination sites on the federal record near Hydesville, the closest Underground Storage Tanks record about 1.0 miles out from the town centreFederal environmental registers
- Hydesville's boundary and the 4,800 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~278-day seasonGrowable Ground crop-matching engine
- The ecoregion at Hydesville's own centroid, the Coast RangeUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Hydesville has no normal of its own, so its county's is the closest measured readfrom Humboldt County
- Soil character — no town-scale survey exists, so Hydesville's 4,800 acres read through its county's SSURGO summaryfrom Humboldt County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Humboldt 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 Humboldt County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hydesville's 4,800 acreswhy one lot differs from the next →
- Which side of Hydesville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,800 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 1.0 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 Hydesville-wide figureread your own land →
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