Bonny Doon, California, sits in USDA hardiness zone 9b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
A short list that earns its place here — okra, meyer lemon, california poppy, and artichoke — with any one site's soil, sun, and drainage making the final cut.
Even in Bonny Doon, 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 Bonny Doon 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 Bonny Doon — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Bonny Doon — the short answer
Bonny Doon, California: USDA zone 9b, about 333 days between hard freezes, across 11K acres of town.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 17
- Santa Cruz County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 16
- Santa Cruz County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~333
- Santa Cruz County normal — NOAA 1991–2020, nearest to this town
- Town area
- 11K 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 Santa Cruz County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Bonny Doon's average, not your lot's — a low corner or a tree line moves it. Against Bonny Doon's 333-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Bonny Doon
Each reading below is measured for Bonny Doon itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsBonny Doon runs about 333 days between hard freezes (read from Santa Cruz County, the closest normal to Bonny Doon) — 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
MeasuredBonny Doon 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 Bonny Doon is in
Bonny Doon sits in the Coast Range — EPA Level III, inside the wider Marine West Coast Forest. That is read at Bonny Doon's own centroid rather than borrowed from Santa Cruz County.
What Grows in Bonny Doon
Every plant below cleared Bonny Doon's own zone 9b and its 333-day season. Each card opens that plant's California profile. How we score.
Is it too late to plant in Bonny Doon?
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 17 (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 Bonny Doon
Closest first, within ~10 miles of Bonny Doon. Listing isn't leaking, and distance isn't exposure.
- DOUGLAS MURDOCK RESIDENCEBrownfields · 1.0 mi
- JOBY AVIATIONBrownfields · 1.3 mi
- NORTH COAST LLCBrownfields · 1.5 mi
- ADVANTAGE MFG INCBrownfields · 1.9 mi
- FELTON QUARRYToxics Release Inventory · 2.0 mi
- CALIFORNIA DEPARTMENT OF FORESTRYBrownfields · 2.1 mi
- 010S002W29H007MNitrate · 2.3 mi
- SAN LORENZO VALLEY UNIFIED SCHOOL DISTRICTBrownfields · 3.3 mi
- FELTON EMPIRE VINYARDS INCBrownfields · 3.3 mi
- FORMER VALETERIA CLEANERSBrownfields · 3.4 mi
- FELTON MAINTENANCE YARDUnderground Storage Tanks · 3.4 mi
- CAL-FIREBrownfields · 3.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Bonny Doon'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 Bonny Doon.
Sources Checked
within ~10 miles of Bonny Doon
Severity Distribution
within ~10 miles of Bonny Doon
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Bonny Doon, Brownfields runs higher than the national average — 603 sites within ~10 miles of Bonny Doon. 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 Bonny Doon
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 Bonny Doon average
Your land is one point inside Bonny Doon
Everything above resolves to Bonny Doon as a whole — one PHZM band, read across 11K acres, with hard-freeze dates borrowed from Santa Cruz 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 Bonny Doon Average
Bonny Doon Average
- ●USDA Zones 9b, averaged across Bonny Doon
- ●One soil character for all of Bonny Doon
- ●Frost dates read at Bonny Doon's scale: Jan 17 to Dec 16
YOUR Parcel
- ✓Your exact zone, not Bonny Doon's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Bonny Doon
Pull a site-specific report for your exact address in Bonny Doon, California — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Bonny Doon averages can't show:
We read public map data around Bonny Doon — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Bonny Doon average
How we know this about Bonny Doon
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 Santa Cruz 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 Bonny Doon
When does frost risk typically end in Bonny Doon?
The last hard freeze (28°F) in Bonny Doon typically lands around Jan 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 Feb 7.
When is the first frost in Bonny Doon?
The first hard freeze (28°F) in Bonny Doon 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 333 days after the spring freeze cleared.
How long is the growing season in Bonny Doon?
Measured between 28°F hard freezes, Bonny Doon sees about 333 frost-free days — roughly Jan 17 through Dec 16, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 7 to Dec 2, about 298 days.
Is the soil safe to grow vegetables in Bonny Doon?
The federal record around Bonny Doon is a meaningful one — 708 documented sites, mostly Brownfields entries (603), the nearest Brownfields 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 Bonny Doon?
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 Bonny Doon's scale — its 9b band and its 333-day season. Your yard writes its own version of Bonny Doon'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 Bonny Doon’s own scale
5 of the readings below were taken at Bonny Doon's own scale — the 10,600 acres it covers and 708 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Bonny Doon's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 708 documented contamination sites on the federal record near Bonny Doon, the closest Brownfields record about 1.0 miles out from the town centreFederal environmental registers
- Bonny Doon's boundary and the 10,600 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~333-day seasonGrowable Ground crop-matching engine
- The ecoregion at Bonny Doon's own centroid, the Coast RangeUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Bonny Doon has no normal of its own, so its county's is the closest measured readfrom Santa Cruz County
- Soil character — no town-scale survey exists, so Bonny Doon's 10,600 acres read through its county's SSURGO summaryfrom Santa Cruz County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Santa Cruz 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 Santa Cruz County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Bonny Doon's 10,600 acreswhy one lot differs from the next →
- Which side of Bonny Doon you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 10,600 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Bonny Doon-wide figureread your own land →