Conditional — Some Areas
quaking aspen (zones 1-6) reaches only part of California (4b-11a): zones 4-6 are in range, so where you are in the state decides it.
Quaking Aspen in California — the short answer
Quaking Aspen in California: hardy in zones 1–6, full sun.
- Plant zones
- 1-6
- Rated hardy to zone 1a by NC State Extension Gardener Plant Toolbox, checked Oct 2026. Ceiling: NC State Extension Gardener Plant Toolbox (read 2026-10-05).
- California zones
- 4b-11a
- USDA PHZM 2023
- Frost window
- Jan 19 - Mar 19 – Nov 29 - Dec 12
- NOAA RCC ACIS 1991-2020, 28°F
- Shortest county season
- 108 days
- NOAA Regional Climate Centers ACIS, 1991-2020, county 28°F killing freeze
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — per-field provenance varies and is published with the dataset.
Your yard isn't the whole zone.
California spans zones 4b-11a, but your yard sits in exactly one — and slope, tree cover, and cold-air pockets nudge it further. Enter your address and we'll score quaking aspen against your parcel's actual hardiness, soil, and sun.
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California is not one climate
California’s winter-low ladder runs across 58 counties, from zone 6 in Mono County to zone 10.5 in San Francisco County. That is 45°F between the two counties’ average coldest night — the difference between quaking aspen overwintering in the ground and coming under cover.
The middle half of 58 counties runs 9–9.5 zones, with a median of 9.5 zones — a 4.5-zone span end to end.
Measured across 58 California counties. USDA PHZM 2023, per county. Quartiles are order statistics — every figure shown is a value a real county recorded, not an interpolation. Your own site sits somewhere inside this range; a parcel report resolves where.
Where in California Fits Best
Quaking Aspen is rated for zones 1–6 — a cold floor USDA puts at -60 to -50°F. Against California’s 58 counties that band holds in 1 of them, and the line runs at Mono County (zone 6a), the coldest county still inside it.
Inside zones 1–6
1 county
0 of 1 shown
Above the zone 6 ceiling
57 counties
- Alpine County · zone 6b
- Lassen County · zone 7a
- Modoc County · zone 7a
3 of 57 shown
Warmer than the zone 6 end of its range.
County hardiness zones: USDA Plant Hardiness Zone Map (PHZM) 2023, per county. A zone is a 10°F band of average annual extreme minimum temperature, so the floor above is the band the plant's rating denotes, not a single measured kill point. Slope, shelter and cold-air drainage routinely move a site half a zone either way from its county figure — which is the part only your address resolves.
Even within California's zones 4b-11a, county microclimates differ enough to change what thrives. These counties carry the closest zone match for quaking aspen (USDA PHZM 2023):
Zone Comparison
Quaking Aspen Needs
- USDA Zones: 1-6
- Sun: Full Sun
- Mature size: 65 ft tall
- Drought tolerance: Low
California Has
- USDA Zones: 4b-11a
- Last Hard Freeze (28°F): Jan 19 - Mar 19
- First Hard Freeze (28°F): Nov 29 - Dec 12
- Annual Rainfall: 5-80 inches
- Common Soils: Alluvial clay, Sandy loam, Adobe clay
Plant Zone Range (zones 1-6)
Preferred Soil pH
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS, and university Extension sources — per-field provenance varies and is published with the dataset. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Quaking Aspen in California
The frost window
Across California, the last spring hard freeze (28°F) clears between Jan 19 and Mar 19, and the first fall hard freeze lands between Nov 29 and Dec 12 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 255-day window you can count on — up to 327 days on a mild site in a kind year. That marks the hard freeze, not the last light frost, so tender transplants usually wait another 2-3 weeks.
Winter standing
California runs as cold as USDA zone 4, and no sourced winter-hardiness floor is on record for quaking aspen, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether quaking aspen is a permanent planting or a replant-every-spring crop for you turns on your own zone within California; check its hardiness range against that before treating it as long-lived ground.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: Growable Ground Plant Database — frost-free days from FAO ECOCROP, days to harvest from university Extension production guides, and growing-degree-day and chill-hour minimums that are compilation estimates rather than published figures. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Growing Season Fit
The zone check says quaking aspen survives winter in part of California, not across all of it. Whether the season is long enough — and warm enough — is a different question.
Chill hours
Quaking Aspen requires ~1000 chill hours (32-45°F dormancy window). California typically banks ~1172 chill hours per winter (from PRISM 1991-2020 climate normals), which keeps this plant on track.
GDD and chill-hour figures are computed from PRISM 1991-2020 monthly climate normals; frost-free days from NOAA Regional Climate Centers ACIS, 1991-2020. Each is the state median across its counties (P25/P75 span the within-state spread). Hardiness-zone range is USDA PHZM 2023.
Soil + Drainage Fit
Quaking Aspen tolerates a wide pH range (pH 4.5-9.9) — 5.4 units, acid ground through alkaline — so soil acidity is rarely what limits it in California. A soil test is still worth having, but for what else it tells you about this site, not to clear this plant. It will grow across that whole span, but it does best between pH 5.5 and 7 — worth knowing before you decide whether a California soil test result is a problem or just a number. Drainage matters: this plant wants poorly (saturated >50% of year), well (dry spells). If your California site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Plant pH requirements: FAO ECOCROP and USDA PLANTS, with the remaining rows from other published sources or Growable Ground compilation. Drainage: FAO ECOCROP, with the remaining rows from other published sources or Growable Ground compilation. California soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
What Else to Consider for Quaking Aspen in California
Zone compatibility tells you about winter cold survival — but California growers also need to think about:
Drought is a persistent challenge — irrigation is essential in most regions
Wildfire risk affects rural and foothill properties
Adobe clay soils in valleys drain poorly without amendment
Wide climate variation means plant selection is highly location-specific
What to actually do about these — and the constraints that apply to every California grower, not just quaking aspen — is covered on the California growing guide.
Where in California Quaking Aspen Is Zone-Hardy
Quaking Aspen is rated for USDA zones 1–6. 1 of California’s 58 counties fall inside that band. The coldest that does is Mono County at zone 6a. 57 counties sit above its zone 6 ceiling, where the limit is too little winter chill rather than too much cold. Where you are in California decides this one.
Across those 58 counties California’s winter-low ladder runs from zone 6a in Mono County to zone 10b in San Francisco County — 4.5 USDA zones of spread, which is 45°F between the two counties’ average coldest night of the year. That is why a statewide hardiness answer is where you start and not where you finish.
The planting window moves with it. Mono County holds its last hard freeze (28°F) until about Jun 4, while Marin County is clear by Jan 9 — 146 days apart. Set quaking aspen out on your county’s date, not the state’s.
County hardiness zones: USDA Plant Hardiness Zone Map (PHZM) 2023, per county. County last-freeze dates: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F killing freeze — earlier than the folk 32°F "last frost". Quaking Aspen’s zone 1–6 band: Rated hardy to zone 1a by NC State Extension Gardener Plant Toolbox, checked Oct 2026. Ceiling: NC State Extension Gardener Plant Toolbox (read 2026-10-05).. A parcel report resolves your address’s own zone and frost dates rather than its county’s.
California Cooperative Extension
For California-specific cultivar recommendations, planting calendars, and pest pressure for quaking aspen, the canonical source is UC Agriculture and Natural Resources. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Quaking Aspen native to California?
Yes — the USDA PLANTS Database (accessed 2026-07-01) documents Quaking Aspen as native to California. Planting it supports the pollinators and wildlife that evolved alongside it.
Native-range data: USDA PLANTS Database state-distribution records, accessed 2026-07-01.
Common Questions About Growing Quaking Aspen in California
When can I plant Quaking Aspen in California?
California's last spring hard freeze (28°F) clears between Jan 19 and Mar 19, and the first fall hard freeze lands between Nov 29 and Dec 12 (NOAA Regional Climate Centers ACIS, 1991-2020). No sourced winter-hardiness floor is on record for Quaking Aspen, so this page does not state whether it overwinters in California and publishes no fall establishment date for it — check its hardiness range against your own zone before treating it as a permanent planting.
What hardiness zone is Quaking Aspen grown in across California?
California spans USDA hardiness zones 4b-11a (USDA ARS PHZM 2023). Quaking Aspen carries a range of zones 1-6, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical California site have?
A typical California site sees ~317 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Quaking Aspen needs 120+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Quaking Aspen native to California?
Yes — the USDA PLANTS Database (accessed 2026-07-01) documents Quaking Aspen as native to California. Planting it supports the pollinators and wildlife that evolved alongside it.
How should I amend the soil for Quaking Aspen in California?
Quaking Aspen tolerates pH 4.5-9.9 and poorly (saturated >50% of year), well (dry spells) drainage (FAO ECOCROP). That is a 5.4-unit span, acid ground through alkaline, so pH is rarely what limits this plant on a California site — amend for drainage and organic matter first.
Will Quaking Aspen actually grow on my specific land in California?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores quaking aspen against your address's exact soil pH, drainage, sun, and frost-date data drawn from USDA SSURGO, NOAA, and PRISM — not state averages.
Check your specific parcel in California
State-level data is a sketch. Your Growable Ground report scores quaking aspen against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that California quaking aspen averages can't show:
We read public map data around California — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the California quaking aspen average
Explore More
Growing guides for quaking aspen
Explore California county by county
California carries 58 counties with their own USDA zone — a sample of the growing pages for quaking aspen there:
Where else quaking aspen grows
Quaking Aspen's zone band crosses state lines — these are the states closest to California in winter climate where it also has a page, plus the far ends of its range. Each one re-answers the question with that state's own record.
More to grow in California
California has a growing page for 1,041 plants — a rotating sample of the rest of the shelf.
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