Generally — Most Areas
Osage orange (zones 5-11) suits most of Vermont (4a-6a) — zones 5-6 are in range, and the rest of the state is the exception.
Osage Orange in Vermont — the short answer
Osage Orange in Vermont: hardy in zones 5–11, full sun, against a state median of ~163 frost-free days.
- Plant zones
- 5-11
- Manual horticultural correction (source not retained); NC State Extension and Missouri Botanical Garden, with the remaining rows from other published sources or Growable Ground compilation
- Vermont zones
- 4a-6a
- USDA PHZM 2023
- Frost window
- Apr 27 - May 5 – Oct 10 - Oct 17
- NOAA RCC ACIS 1991-2020, 28°F
- Shortest county season
- 146 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.
Vermont spans zones 4a-6a, 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 osage orange against your parcel's actual hardiness, soil, and sun.
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Vermont is not one climate
Vermont’s winter-low ladder runs across 14 counties, from zone 4.5 in Caledonia County to zone 5.5 in Windsor County. That is 10°F between the two counties’ average coldest night — the difference between osage orange overwintering in the ground and coming under cover.
The middle half of 14 counties runs 4.5–5 zones, with a median of 5 zones — a 1-zone span end to end.
Measured across 14 Vermont 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 Vermont Fits Best
Osage Orange is rated for zones 5–11 — a cold floor USDA puts at -20 to -10°F. Against Vermont’s 14 counties that band holds in 9 of them, and the line runs at Addison County (zone 5a), the coldest county still inside it.
Inside zones 5–11
9 counties
- Bennington County · zone 5a
- Chittenden County · zone 5a
- Grand Isle County · zone 5a
3 of 9 shown
Below the zone 5 floor
5 counties
- Caledonia County · zone 4b
- Essex County · zone 4b
- Franklin County · zone 4b
3 of 5 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 Vermont's zones 4a-6a, county microclimates differ enough to change what thrives. These counties carry the closest zone match for osage orange (USDA PHZM 2023):
Zone Comparison
Osage Orange Needs
- USDA Zones: 5-11
- Frost-Free Days: 180+
- Sun: Full Sun
- Mature size: 40 ft tall
- Drought tolerance: Medium
Vermont Has
- USDA Zones: 4a-6a
- Last Hard Freeze (28°F): Apr 27 - May 5
- First Hard Freeze (28°F): Oct 10 - Oct 17
- Annual Rainfall: 34-44 inches
- Common Soils: Glacial till, Clay, Silt loam
Plant Zone Range (zones 5-11)
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 Osage Orange in Vermont
The frost window
Across Vermont, the last spring hard freeze (28°F) clears between Apr 27 and May 5, and the first fall hard freeze lands between Oct 10 and Oct 17 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 158-day window you can count on — up to 173 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
Vermont runs as cold as USDA zone 4, and no sourced winter-hardiness floor is on record for osage orange, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether osage orange is a permanent planting or a replant-every-spring crop for you turns on your own zone within Vermont; 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 osage orange survives winter in part of Vermont, not across all of it. Whether the season is long enough — and warm enough — is a different question.
Frost-free days
Osage Orange wants 180+ frost-free days; a typical Vermont site sees ~163 (NOAA Regional Climate Centers ACIS, 1991-2020) — 17 days short of what it needs. A typical Vermont season does not carry this crop to harvest outdoors, and a gap that size is not one an earlier sowing date or a faster cultivar closes; growing it here means growing it under cover.
Chill hours
Osage Orange requires ~400 chill hours (32-45°F dormancy window). Vermont typically banks ~2500 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
Osage Orange tolerates a wide pH range (pH 4.5-7.5) — 3 units, acid ground through alkaline — so soil acidity is rarely what limits it in Vermont. A soil test is still worth having, but for what else it tells you about this site, not to clear this plant.
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. Vermont soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
What Else to Consider for Osage Orange in Vermont
Zone compatibility tells you about winter cold survival — but Vermont growers also need to think about:
Short growing season (100-130 frost-free days)
Rocky soils throughout the Green Mountains
Heavy clay in the Champlain Valley
What to actually do about these — and the constraints that apply to every Vermont grower, not just osage orange — is covered on the Vermont growing guide.
Timing shifts within Vermont
Osage Orange needs about 180 days of frost-free season to complete its cycle. 1 of Vermont’s 14 counties give it that outright. The tightest that does is Grand Isle County at 190 frost-free days — 10 to spare. Below that line you are transplanting or extending the season, not direct-sowing.
County last-freeze dates and frost-free day counts: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F freeze (earlier than the folk 32°F "last frost"). Osage Orange's 180-day requirement: USDA PLANTS / Growable Ground plant database (minimum frost-free days). A parcel report resolves your address's own frost dates.
Vermont Cooperative Extension
For Vermont-specific cultivar recommendations, planting calendars, and pest pressure for osage orange, the canonical source is UVM Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Osage Orange native to Vermont?
Osage Orange is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-07-01) does not document a native range in Vermont. It can still earn a place in a Vermont garden — the zone comparison above tells you whether it will thrive.
Looking for plants that belong here? The Vermont growing guide lists USDA-documented natives for the state.
Native-range data: USDA PLANTS Database state-distribution records, accessed 2026-07-01.
Common Questions About Growing Osage Orange in Vermont
When can I plant Osage Orange in Vermont?
Vermont's last spring hard freeze (28°F) clears between Apr 27 and May 5, and the first fall hard freeze lands between Oct 10 and Oct 17 (NOAA Regional Climate Centers ACIS, 1991-2020). No sourced winter-hardiness floor is on record for Osage Orange, so this page does not state whether it overwinters in Vermont 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 Osage Orange grown in across Vermont?
Vermont spans USDA hardiness zones 4a-6a (USDA ARS PHZM 2023). Osage Orange carries a range of zones 5-11, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Vermont site have?
A typical Vermont site sees ~163 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Osage Orange needs 180+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Osage Orange native to Vermont?
Osage Orange is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-07-01) does not document a native range in Vermont. It can still earn a place in a Vermont garden — the zone comparison above tells you whether it will thrive.
How should I amend the soil for Osage Orange in Vermont?
Osage Orange tolerates pH 4.5-7.5 (USDA PLANTS). That is a 3-unit span, acid ground through alkaline, so pH is rarely what limits this plant on a Vermont site — amend for drainage and organic matter first.
Will Osage Orange actually grow on my specific land in Vermont?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores osage orange 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 Vermont
State-level data is a sketch. Your Growable Ground report scores osage orange against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that Vermont osage orange averages can't show:
We read public map data around Vermont — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Vermont osage orange average
Explore More
Growing guides for osage orange
Explore Vermont county by county
Vermont carries 14 counties with their own USDA zone — a sample of the growing pages for osage orange there:
Where else osage orange grows
Osage Orange's zone band crosses state lines — these are the states closest to Vermont 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 Vermont
Vermont has a growing page for 747 plants — a rotating sample of the rest of the shelf.
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