Generally — Most Areas
Confederate jasmine (zones 8-10) suits most of Oregon (5a-10a) — zones 8-10 are in range, and the rest of the state is the exception.
Confederate Jasmine in Oregon — the short answer
Confederate Jasmine in Oregon: hardy in zones 8–10, part sun.
- Plant zones
- 8-10
- Rated hardy to zone 8a by NC State Extension Gardener Plant Toolbox; USDA PLANTS Database lists 7 °F, converted to zone 8a, checked Oct 2026. Ceiling: not verified.
- Oregon zones
- 5a-10a
- USDA PHZM 2023
- Frost window
- Feb 25 - Apr 26 – Oct 19 - Nov 26
- NOAA RCC ACIS 1991-2020, 28°F
- Shortest county season
- 86 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.
Oregon spans zones 5a-10a, 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 confederate jasmine against your parcel's actual hardiness, soil, and sun.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
No card required · your parcel report in seconds — read in full free for your first 14 days
Oregon is not one climate
Oregon’s winter-low ladder runs across 36 counties, from zone 6 in Klamath County to zone 9.5 in Curry County. That is 35°F between the two counties’ average coldest night — the difference between confederate jasmine overwintering in the ground and coming under cover.
The middle half of 36 counties runs 6.5–8.5 zones, with a median of 7.5 zones — a 3.5-zone span end to end.
Measured across 36 Oregon 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 Oregon Fits Best
Confederate Jasmine is rated for zones 8–10 — a cold floor USDA puts at 10 to 20°F. Against Oregon’s 36 counties that band holds in 18 of them, and the line runs at Clackamas County (zone 8a), the coldest county still inside it.
Inside zones 8–10
18 counties
- Josephine County · zone 8a
- Marion County · zone 8a
- Benton County · zone 8b
3 of 18 shown
Below the zone 8 floor
18 counties
- Klamath County · zone 6a
- Baker County · zone 6b
- Crook County · zone 6b
3 of 18 shown
Winter cold is the limit here — the same plant works in a container that comes under cover.
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 Oregon's zones 5a-10a, county microclimates differ enough to change what thrives. These counties carry the closest zone match for confederate jasmine (USDA PHZM 2023):
Zone Comparison
Confederate Jasmine Needs
- USDA Zones: 8-10
- Sun: Part Sun
- Mature size: 20 ft tall
- Drought tolerance: Medium
Oregon Has
- USDA Zones: 5a-10a
- Last Hard Freeze (28°F): Feb 25 - Apr 26
- First Hard Freeze (28°F): Oct 19 - Nov 26
- Annual Rainfall: 8-90 inches
- Common Soils: Volcanic, Silt loam (Willamette), Sandy loam
Plant Zone Range (zones 8-10)
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 Confederate Jasmine in Oregon
The frost window
Across Oregon, the last spring hard freeze (28°F) clears between Feb 25 and Apr 26, and the first fall hard freeze lands between Oct 19 and Nov 26 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 176-day window you can count on — up to 274 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
Oregon runs as cold as USDA zone 5, and no sourced winter-hardiness floor is on record for confederate jasmine, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether confederate jasmine is a permanent planting or a replant-every-spring crop for you turns on your own zone within Oregon; check its hardiness range against that before treating it as long-lived ground.
Timing tuned to sub-state frost dates — Klamath County, not the statewide average.
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 confederate jasmine survives winter in part of Oregon, not across all of it. Whether the season is long enough — and warm enough — is a different question.
Growing degree days
Confederate Jasmine needs ~1200 GDD (base 50°F) to ripen. We haven't confirmed this against a published source yet. The state median runs ~1666 GDD (from PRISM 1991-2020 climate normals), so Oregon's typical season clears that easily.
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
Confederate Jasmine likes near-neutral soil (pH 5.5-7). That's the common-ground band across Oregon's volcanic and silt loam (willamette) — a soil test confirms it for your site. It will grow across that whole span, but it does best between pH 6 and 7 — worth knowing before you decide whether a Oregon soil test result is a problem or just a number. Preferred pH: We haven't confirmed this against a published source yet.
Your land, not the state average
Oregon's soils run mostly silt loam, but SSURGO maps the series, texture, and drainage under your exact parcel. What matters for confederate jasmine is the horizon its roots actually work, not the surface. That map unit, not the state average, decides how confederate jasmine performs.
Check your parcel → Source: USDA NRCS SSURGO.
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. Oregon soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
What Else to Consider for Confederate Jasmine in Oregon
Zone compatibility tells you about winter cold survival — but Oregon growers also need to think about:
West side: excessive rain and overcast skies reduce sun for warm-season crops
East side: arid conditions (8-15 inches rainfall) require irrigation
Slug pressure is extreme in western Oregon
Mountain areas have very short seasons (60-90 frost-free days)
Growing confederate jasmine here specifically
Confederate Jasmine needs pH 5.5–7.0; Oregon's dominant silt loam soils may or may not deliver that, so your parcel's SSURGO map unit is the real test.
Start with a soil test on your own ground and adjust pH and texture to fit confederate jasmine's 5.5–7.0 range. How to handle it →
What to actually do about these — and the constraints that apply to every Oregon grower, not just confederate jasmine — is covered on the Oregon growing guide.
Timing shifts within Oregon
Oregon isn't one climate. In Klamath County, the last hard freeze (28°F) holds until about Jun 9 — roughly 67 days later than the recorded state median — so plant confederate jasmine to your county's window, not the statewide date.
County last-freeze dates: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F freeze (earlier than the folk 32°F "last frost"). A parcel report resolves your address's own frost dates.
Where in Oregon Confederate Jasmine Is Zone-Hardy
Confederate Jasmine is rated for USDA zones 8–10. 18 of Oregon’s 36 counties fall inside that band. The coldest that does is Clackamas County at zone 8a. 18 counties sit below the plant’s zone 8 floor, where an unprotected plant is relying on snow cover and a mild year. Where you are in Oregon decides this one.
Across those 36 counties Oregon’s winter-low ladder runs from zone 6a in Klamath County to zone 9b in Curry County — 3.5 USDA zones of spread, which is 35°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. Klamath County holds its last hard freeze (28°F) until about Jun 9, while Lincoln County is clear by Feb 3 — 126 days apart. Set confederate jasmine 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". Confederate Jasmine’s zone 8–10 band: Rated hardy to zone 8a by NC State Extension Gardener Plant Toolbox; USDA PLANTS Database lists 7 °F, converted to zone 8a, checked Oct 2026. Ceiling: not verified.. A parcel report resolves your address’s own zone and frost dates rather than its county’s.
Pollinator + Wildlife Value
Confederate Jasmine draws honeybees and butterflies (moderate value). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, confederate jasmine can only work that bloom inside Oregon's frost window — roughly 213 days, opening after the last 28°F freeze (Feb 25 - Apr 26) and closing at the first (Oct 19 - Nov 26), per NOAA Regional Climate Centers ACIS, 1991-2020. Pollinator value: We haven't confirmed this against a published source yet.
Good to Know Before You Plant Confederate Jasmine
Confederate Jasmine is listed as toxic to dogs, cats (all) at a mild level. (Source: Pet Poison Helpline.) Most listed plants only cause brief upset — a raised bed or a fenced corner usually keeps curious pets clear.
Oregon Cooperative Extension
For Oregon-specific cultivar recommendations, planting calendars, and pest pressure for confederate jasmine, the canonical source is OSU Extension Service. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Confederate Jasmine native to Oregon?
No — the USDA PLANTS Database lists Confederate Jasmine as introduced rather than native in the Lower 48, so it is not part of Oregon's native flora. It grows here as a garden plant; pairing it with a few Oregon natives keeps local pollinators fed too.
Looking for plants that belong here? The Oregon growing guide lists plants that USDA PLANTS records growing in Oregon and that Kew and NatureServe Explorer both list in its native range, leaving out any that NatureServe flags as exotic there or that our audit holds.
State records: USDA PLANTS Database state-distribution data (presence, not state-level nativity), accessed 2026-10-19.
Common Questions About Growing Confederate Jasmine in Oregon
When can I plant Confederate Jasmine in Oregon?
Oregon's last spring hard freeze (28°F) clears between Feb 25 and Apr 26, and the first fall hard freeze lands between Oct 19 and Nov 26 (NOAA Regional Climate Centers ACIS, 1991-2020). No sourced winter-hardiness floor is on record for Confederate Jasmine, so this page does not state whether it overwinters in Oregon 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 Confederate Jasmine grown in across Oregon?
Oregon spans USDA hardiness zones 5a-10a (USDA ARS PHZM 2023). Confederate Jasmine carries a range of zones 8-10, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Oregon site have?
A typical Oregon site sees ~213 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Confederate Jasmine needs 215+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date. In cooler counties like Klamath, the freeze-free season runs shorter than the state average, so verify your own county's window.
Is Confederate Jasmine native to Oregon?
No — the USDA PLANTS Database lists Confederate Jasmine as introduced rather than native in the Lower 48, so it is not part of Oregon's native flora. It grows here as a garden plant; pairing it with a few Oregon natives keeps local pollinators fed too.
How should I amend the soil for Confederate Jasmine in Oregon?
Confederate Jasmine prefers pH 5.5-7 (USDA NRCS PLANTS Database). That sits in the common-ground band across Oregon soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Confederate Jasmine actually grow on my specific land in Oregon?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores confederate jasmine against your address's mapped soil pH, drainage, sun, and frost-date data drawn from USDA SSURGO, NOAA, and PRISM — not state averages.
Check your specific parcel in Oregon
State-level data is a sketch. Your Growable Ground report scores confederate jasmine against your land's mapped soil, modelled sun, drainage, and frost data — not zone averages.
Three things about your lot that Oregon confederate jasmine averages can't show:
We read public map data around Oregon — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Oregon confederate jasmine average
Explore More
Growing guides for confederate jasmine
Explore Oregon county by county
Oregon carries 36 counties with their own USDA zone — a sample of the growing pages for confederate jasmine there:
Where else confederate jasmine grows
Confederate Jasmine's zone band crosses state lines — these are the states closest to Oregon 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 Oregon
Oregon has a growing page for 1,033 plants — a rotating sample of the rest of the shelf.
Analysis by the Growable Ground research team, grounded in USDA PLANTS, USDA NRCS SSURGO, NOAA Climate Normals (1991-2020), and named Cooperative Extension sources. How we know →
Cite this dataset
Kirchick, M. (2026). Growable Ground Plant Database [Data set]. Zenodo. https://doi.org/10.5281/zenodo.21435643
Licensed CC BY-NC 4.0. DOI 10.5281/zenodo.21435643
Last updated: