Conditional — Some Areas
sweet potato (zones 3-11) has limited zone overlap with Vermont (3b-5b). Only zones 3-5 in the state are suitable.
Your yard isn't the whole zone.
Sweet Potato is grown as an annual, so your winter zone isn't the deciding factor — your frost-free window is, and slope, trees, and low spots move the last-frost date across a single yard. Enter your address and we'll score sweet potato against your parcel's actual frost dates, sun, and soil.
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Zone Comparison
Sweet Potato Needs
- USDA Zones: 3-11
- Soil pH: 4 - 8.7
- Sun: Full Sun
- Frost-Free Days: 80+
Vermont Has
- USDA Zones: 3b-5b
- Last Frost: May 5 - Jun 1
- First Frost: Sep 10 - Oct 5
- Annual Rainfall: 34-44 inches
- Common Soils: Glacial till, Clay, Silt loam
Plant Zone Range (zones 3-11)
Preferred Soil pH
Plant data: USDA PLANTS Database / plant_species_v5.csv. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Sweet Potato in Vermont
The frost window
Across Vermont, the last spring frost clears between May 5 and Jun 1, and the first fall frost lands between Sep 10 and Oct 5 (NOAA Climate Normals 1991-2020). Counting from the latest last frost to the earliest first frost, that's a 101-day window you can count on — up to 153 days on a mild site in a kind year.
Frost tenderness
Sweet Potato is frost-tender — its listed minimum temperature is 50°F (USDA PLANTS Database) — so set plants out after the last frost has cleared your local site, not the state's earliest date.
Days to maturity vs. the window
At 110 days to maturity (USDA PLANTS Database), the fit is tight: Vermont's dependable window runs 101 days. Starting seeds indoors and transplanting at the front of the window banks the difference.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: USDA PLANTS Database. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Growing Season Fit
Zone compatibility says you can survive winter here. Whether the growing season is long enough — and warm enough — is a different question.
Frost-free days
Sweet Potato wants 80+ frost-free days; a typical Vermont site sees ~150 (NOAA Climate Normals). That leaves comfortable headroom for succession planting.
Growing degree days
Sweet Potato needs ~2400 GDD (base 50°F) to ripen. The state median runs ~2700 GDD (USDA NRCS county aggregates), so Vermont sits right at the threshold — pay attention to siting and microclimate.
Climate aggregates derive from USDA NRCS county-level hardiness data + Cornell CALS Extension GDD-by-region tables + MSU Extension chill-hours-by-zone (1991-2020 NOAA Climate Normals baseline).
Soil + Drainage Fit
Sweet Potato likes near-neutral soil (pH 4-8.7). That's the common-ground band across Vermont's glacial till and clay — a soil test confirms it for your site.
Your land, not the state average
Vermont's soils run mostly fine sandy loam, but SSURGO maps the series, texture, and drainage under your exact parcel — that map unit, not the state average, decides how sweet potato performs.
Check your parcel → Source: USDA NRCS SSURGO.
Plant pH and drainage requirements from USDA PLANTS Database. Vermont soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Sweet Potato in Vermont — Quick Answer
- Verdict: Conditional — Some Areas
- Plant Zones: 3-11 (USDA PLANTS Database)
- State Zones: 3b-5b (USDA ARS PHZM 2023)
- Growing Season: May 5 - Jun 1 to Sep 10 - Oct 5 (NOAA Climate Normals)
- Days to Maturity: 110 days
What Else to Consider
Zone compatibility tells you about winter cold survival — but Vermont growers also need to think about:
Short growing season (100-130 frost-free days)
Indoor starts, fast varieties, and a cold frame on each shoulder — the Vermont formula for making 110 days feel like 150.
Rocky soils throughout the Green Mountains
Raised beds spare you the stone harvest — build up over cleared ground and plant the same weekend.
Heavy clay in the Champlain Valley
Champlain clay holds spring water late — raised or mounded beds dry out and warm up weeks earlier for planting.
Growing sweet potato here specifically
Sweet Potato sends medium roots and rates to zones 3–11, but much of Vermont sits on slow-draining, restrictive ground (SSURGO hydrologic group D) that forks and stunts them.
Loosen a deep, stone-free bed for sweet potato and break any compacted or hardpan layer before planting. How to handle it →
Pollinator + Wildlife Value
Sweet Potato draws pollinators (low value, USDA PLANTS Database). Planting it near vegetable beds can lift fruit set on neighboring crops.
Good to Know Before You Plant Sweet Potato
On Growable Ground, Sweet Potato means Ipomoea batatas — not to be confused with true yams (Dioscorea species). often sold as 'yams' in US markets, but sweet potato is botanically unrelated.
Recommended Sweet Potato Varieties for Vermont
These are a regional Cooperative Extension recommendation covering Vermont (cited source, 2026). Variety facts aren't ours — we extract and cite them; the full list lives at the linked source.
Tier 2 — a regional Cooperative Extension consortium recommendation. Cultivar data: PLANT_DATABASE/cultivar_registry.json (provenance-gated).
Vermont Cooperative Extension
For Vermont-specific cultivar recommendations, planting calendars, and pest pressure for sweet potato, the canonical source is UVM Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Sweet Potato native to Vermont?
Sweet Potato 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 Sweet Potato in Vermont
When can I plant Sweet Potato in Vermont?
Vermont's last spring frost clears between May 5 and Jun 1, and the first fall frost lands between Sep 10 and Oct 5 (NOAA Climate Normals 1991-2020). Sweet Potato is frost-tender — its listed minimum temperature is 50°F (USDA PLANTS Database) — so wait until the last frost has cleared your specific site before planting out.
Can Sweet Potato mature before first frost in Vermont?
It's close: Sweet Potato needs 110 days to mature (USDA PLANTS Database) against Vermont's 101-day dependable window (NOAA Climate Normals 1991-2020). Start seeds indoors and transplant right after last frost to bank the missing days.
What hardiness zone is Sweet Potato grown in across Vermont?
Vermont spans USDA hardiness zones 3b-5b (USDA ARS PHZM 2023). Sweet Potato carries a range of zones 3-11, so the overlap zones are where outdoor growing is most reliable.
Which sweet potato varieties are recommended for Vermont?
Cooperative Extension variety trials for Vermont list 'Beauregard', 'Covington', and 'Carolina Ruby' among recommended sweet potato cultivars (cited source, updated 2026). Match one to your site, then confirm timing and soil against your own parcel — not the state average.
How many frost-free days does a typical Vermont site have?
A typical Vermont site sees ~150 frost-free days per year (derived from NOAA Climate Normals 1991-2020). Sweet Potato needs 80+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is Sweet Potato native to Vermont?
Sweet Potato 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 Sweet Potato in Vermont?
Sweet Potato prefers pH 4-8.7 (USDA PLANTS Database). That sits in the common-ground band across Vermont soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Sweet Potato actually grow on my specific land in Vermont?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores sweet potato 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 sweet potato against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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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 →