Unlikely — Zone Mismatch
fancy yam (zones 10-12) does not overlap with Virginia's zone range (5b-8b). Growing outdoors is unlikely without significant protection.
2 zones short — what would close it
Fancy Yam is hardy to zone 10, and the warmest ground in Virginia is zone 8 — 2 zones short. Planted in open ground it will not survive a Virginia winter. To grow it here, grow fancy yam in an earth-sheltered greenhouse — its modeled 2.5-zone lift covers this gap.
An earth-sheltered greenhouse is the lift this needs. How a greenhouse changes what you can grow →
Zone math from 10-12 (plant) against 6-8 (Virginia). Lift modeled by crop_engine.GREENHOUSE_ZONE_MODIFIER_BY_SUBTYPE['earth_sheltered'] (+2.5 zones) via api/fast_sections.py Unlock Engine v2.
Fancy Yam in Virginia — the short answer
Fancy Yam in Virginia: hardy in zones 10–12, full sun, against a state median of ~224 frost-free days.
- Plant zones
- 10-12
- 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
- Virginia zones
- 5b-8b
- USDA PHZM 2023
- Frost window
- Mar 22 - Apr 2 – Nov 2 - Nov 17
- NOAA RCC ACIS 1991-2020, 28°F
- Shortest county season
- 176 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.
Virginia spans zones 5b-8b, but your yard has its own microclimate — slope, trees, and low spots shift frost and sun across a single parcel. Enter your address and we'll score fancy yam against your land's actual soil, sun, and frost.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Virginia is not one climate
A single Virginia answer averages 133 counties whose growing seasons are 113 days apart — from 176 frost-free days in Highland County to 289 in Hampton County. Which end of that your land sits nearer changes what fancy yam can finish before the first hard freeze.
The middle half of 133 counties runs 214–240 days, with a median of 224 days — a 113-day span end to end.
Measured across 133 Virginia counties. NOAA Regional Climate Centers ACIS, 1991-2020, county 28°F killing freeze. 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 Fancy Yam Stands in Virginia
Fancy Yam is rated for zones 10–12 — a cold floor USDA puts at 30 to 40°F. No Virginia county sits inside it, so in open ground this is a grown-under-cover plant here rather than a bed plant — which is a statement about Virginia winters, not about fancy yam.
Below the zone 10 floor
133 counties
- Highland County · zone 6a
- Bath County · zone 6b
- Bland County · zone 6b
3 of 133 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.
Zone Comparison
Fancy Yam Needs
- USDA Zones: 10-12
- Frost-Free Days: 200+
- Sun: Full Sun
- Picking window: ~30 days of harvest
Virginia Has
- USDA Zones: 5b-8b
- Last Hard Freeze (28°F): Mar 22 - Apr 2
- First Hard Freeze (28°F): Nov 2 - Nov 17
- Annual Rainfall: 36-50 inches
- Common Soils: Red clay (Piedmont), Silt loam, Sandy loam (Tidewater)
Plant Zone Range (zones 10-12)
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 Fancy Yam in Virginia
The frost window
Across Virginia, the last spring hard freeze (28°F) clears between Mar 22 and Apr 2, and the first fall hard freeze lands between Nov 2 and Nov 17 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 214-day window you can count on — up to 240 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.
Frost tenderness
Fancy Yam is frost-tender — FAO ECOCROP puts its killing temperature at 32°F — so set plants out two to three weeks PAST your local last hard freeze, not on it and not on the state's earliest date. The 28°F marker above is when killing freezes stop, not when light frost does. That is the point where cold damages growing tissue, not a winter-survival floor — an established perennial comes through far colder while dormant, which is what its hardiness zone tells you.
Timing tuned to sub-state frost dates — Highland 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 fancy yam does not survive a Virginia winter in the ground. The season figures below measure a different question — whether it could finish a season here at all — and they only bear on Virginia under protection.
Frost-free days
Fancy Yam wants 200+ frost-free days; a typical Virginia site sees ~224 (NOAA Regional Climate Centers ACIS, 1991-2020). That leaves a workable window — start indoors to bank time.
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
Fancy Yam tolerates a wide pH range (pH 4.5-8.5) — 4 units, acid ground through alkaline — so soil acidity is rarely what limits it in Virginia. 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 6.5 — worth knowing before you decide whether a Virginia soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your Virginia site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Your land, not the state average
Whether fancy yam is safe to eat from Virginia soil is a block-by-block question, not a town-wide one — 37,636 documented contamination sites mean levels spike on some parcels and not the one next door. Fancy Yam roots to about 59 inches, so it is the top 59 inches under your address that decide what it takes up, so only a test on your address settles it.
Check your parcel → Source: USDA NRCS SSURGO + EPA/state contamination databases.
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. Virginia soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Before you plant fancy yam for food
Anything you grow to eat takes up what is in the ground it grows in, so what is on record near you is worth knowing before fancy yam goes in. What follows is Virginia’s documented federal record at state scale — a screening signal, not a soil test, and not a statement about any one lot.
Safe to Grow Here?
What the federal record shows across Virginia — and how to grow with it.
We checked the federal record across Virginia — 37,636 documented sites across 8 of the 9 source types we track.
The most significant on record: 164 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Virginia carries one of the heavier federal records we track — and that's not a verdict on your yard. Proximity to a documented site is information, not a diagnosis: nothing here says any particular parcel is affected. It does earn one concrete step — before food beds go in the ground, a professional soil test tells you exactly what you're working with, and raised beds with clean imported soil grow well almost anywhere in the meantime.
Sources Checked
across Virginia
Severity Distribution
across Virginia
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Virginia, Underground Storage Tanks runs higher than the national average — 24,515 sites across Virginia. That's not a problem with your land — it's information about it.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What Else to Consider for Fancy Yam in Virginia
Zone compatibility tells you about winter cold survival — but Virginia growers also need to think about:
Heavy Piedmont red clay requires amendment
Humidity and heat in summer promote disease
Deer pressure is heavy in suburban and rural areas
Growing fancy yam here specifically
Fancy Yam grows its edible root in the soil itself, so on any of Virginia's 37,636 documented contamination sites it can carry up lead you'd then eat.
Keep fancy yam in raised beds of screened clean soil and confirm your parcel's lead level before the first crop. How to handle it →
What to actually do about these — and the constraints that apply to every Virginia grower, not just fancy yam — is covered on the Virginia growing guide.
Timing shifts within Virginia
Virginia isn't one climate. In Highland County, the last hard freeze (28°F) holds until about Apr 27 — roughly 30 days later than the recorded state median — so plant fancy yam to your county's window, not the statewide date.
Fancy Yam needs about 200 days of frost-free season to complete its cycle. 127 of Virginia’s 133 counties give it that outright. The tightest that does is Shenandoah County at 201 frost-free days — 1 to spare. Below that line you are transplanting or extending the season, not direct-sowing.
Across Virginia’s 133 counties the frost-free season runs from 176 days in Highland County to 289 days in Hampton County — a spread of 113 days, which is why a single statewide planting date misleads. The median Virginia county sees 224 frost-free days, leaving fancy yam about 24 days of slack on a typical parcel — room for a second sowing where the season runs long.
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"). Fancy Yam's 200-day requirement: USDA PLANTS / Growable Ground plant database (minimum frost-free days). A parcel report resolves your address's own frost dates.
Pollinator + Wildlife Value
Fancy Yam draws native bees (low value, Growable Ground Plant Database). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, fancy yam can only work that bloom inside Virginia's frost window — roughly 224 days, opening after the last 28°F freeze (Mar 22 - Apr 2) and closing at the first (Nov 2 - Nov 17), per NOAA Regional Climate Centers ACIS, 1991-2020.
Good to Know Before You Plant Fancy Yam
Fancy Yam is listed as toxic to dogs, cats (all) at a mild level (Cornell). Most listed plants only cause brief upset — a raised bed or a fenced corner usually keeps curious pets clear. Worth knowing for placement: in Virginia this is a one-season plant and the first hard freeze (Nov 2 - Nov 17) takes it down, so the exposure above is a summer-long one rather than something standing in the bed all year.
Virginia Cooperative Extension
For Virginia-specific cultivar recommendations, planting calendars, and pest pressure for fancy yam, the canonical source is Virginia Cooperative Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Common Questions About Growing Fancy Yam in Virginia
When can I plant Fancy Yam in Virginia?
Virginia's last spring hard freeze (28°F) clears between Mar 22 and Apr 2, and the first fall hard freeze lands between Nov 2 and Nov 17 (NOAA Regional Climate Centers ACIS, 1991-2020). Fancy Yam is frost-tender — its killing temperature is 32°F (FAO ECOCROP — the point where cold damages growing tissue, not a winter-survival floor) — so wait two to three weeks past your site's last hard freeze, when light frost has also stopped, before planting out.
What hardiness zone is Fancy Yam grown in across Virginia?
Virginia spans USDA hardiness zones 5b-8b (USDA ARS PHZM 2023). Fancy Yam carries a range of zones 10-12, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Virginia site have?
A typical Virginia site sees ~224 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Fancy Yam needs 200+ 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 Highland, the freeze-free season runs shorter than the state average, so verify your own county's window.
How should I amend the soil for Fancy Yam in Virginia?
Fancy Yam tolerates pH 4.5-8.5 and well (dry spells) drainage (FAO ECOCROP). That is a 4-unit span, acid ground through alkaline, so pH is rarely what limits this plant on a Virginia site — amend for drainage and organic matter first.
Will Fancy Yam actually grow on my specific land in Virginia?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores fancy yam 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 Virginia
State-level data is a sketch. Your Growable Ground report scores fancy yam against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that Virginia fancy yam averages can't show:
We read public map data around Virginia — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Virginia fancy yam average
Explore More
Growing guides for fancy yam
Explore Virginia county by county
Virginia carries 133 counties with their own USDA zone — a sample of the growing pages for fancy yam there:
Where else fancy yam grows
Fancy Yam's zone band crosses state lines — these are the states closest to Virginia 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 Virginia
Virginia has a growing page for 1,020 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
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