Unlikely — Zone Mismatch
wase (zones 9-11) does not overlap with Virginia's zone range (5b-8b). Growing outdoors is unlikely without significant protection.
One zone short — what would close it
Wase is hardy to zone 9, and the warmest ground in Virginia is zone 8 — 1 zone short. Planted in open ground it will not survive a Virginia winter. To grow it here, grow wase in a hoop house or unheated greenhouse — its modeled 1.5-zone lift covers this gap.
A hoop house or unheated greenhouse is the lift this needs. How a greenhouse changes what you can grow →
Zone math from 9-11 (plant) against 6-8 (Virginia). Lift modeled by crop_engine.GREENHOUSE_ZONE_MODIFIER_BY_SUBTYPE['hoop_house'] (+1.5 zones) via api/fast_sections.py Unlock Engine v2.
Wase in Virginia — the short answer
Wase in Virginia: hardy in zones 9–11, full sun.
- Plant zones
- 9-11
- Rated hardy to zone 9 by Cal Poly SelecTree; USDA PLANTS Database lists 18 °F, converted to zone 9a, checked Oct 2026. Ceiling: our plant database.
- 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 sits in exactly one — and slope, tree cover, and cold-air pockets nudge it further. Enter your address and we'll score wase 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
Virginia is not one climate
Virginia’s winter-low ladder runs across 133 counties, from zone 6 in Highland County to zone 8.5 in York County. That is 25°F between the two counties’ average coldest night — the difference between wase overwintering in the ground and coming under cover.
The middle half of 133 counties runs 7–7.5 zones, with a median of 7.5 zones — a 2.5-zone span end to end.
Measured across 133 Virginia 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 Wase Stands in Virginia
Wase is rated for zones 9–11 — a cold floor USDA puts at 20 to 30°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 wase.
Below the zone 9 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
Wase Needs
- USDA Zones: 9-11
- Sun: Full SunWe haven't confirmed this against a published source yet.
- Mature size: 15 ft tall
- Drought tolerance: High
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 9-11)
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 Wase 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.
Winter standing
Virginia runs as cold as USDA zone 5, and no sourced winter-hardiness floor is on record for wase, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether wase is a permanent planting or a replant-every-spring crop for you turns on your own zone within Virginia; check its hardiness range against that before treating it as long-lived ground.
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.
Soil + Drainage Fit
Wase 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 7.5 — 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, a raised bed lifts the roots above wet ground, or work in compost.
Your land, not the state average
Virginia's soils run mostly fine sandy loam, but SSURGO maps the series, texture, and drainage under your exact parcel. Wase needs about 19 inches of workable depth, so it is that horizon — not the surface — you are testing for. That map unit, not the state average, decides how wase 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. Virginia soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
What Else to Consider for Wase 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 wase here specifically
Virginia's soils run mostly fine sandy loam (Ultisols), and whether that suits wase's pH 4.5–8.5 preference comes down to your exact parcel, not the statewide picture.
Pull your parcel's SSURGO map unit, test pH, and amend toward wase's 4.5–8.5 target before planting. How to handle it →
What to actually do about these — and the constraints that apply to every Virginia grower, not just wase — 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 wase 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 Virginia Wase Is Zone-Hardy
Wase is rated for USDA zones 9–11. No Virginia county reaches it. Even York County, the state’s mildest winter at zone 8b, sits below the plant’s zone 9 floor — so in open ground this one needs winter protection here, or a container that comes under cover.
Across those 133 counties Virginia’s winter-low ladder runs from zone 6a in Highland County to zone 8b in York County — 2.5 USDA zones of spread, which is 25°F between the two counties’ average coldest night of the year. None of that range reaches the band wase needs, so here the statewide answer really is the answer.
County hardiness zones: USDA Plant Hardiness Zone Map (PHZM) 2023, per county. Wase’s zone 9–11 band: Rated hardy to zone 9 by Cal Poly SelecTree; USDA PLANTS Database lists 18 °F, converted to zone 9a, checked Oct 2026. Ceiling: our plant database.. A parcel report resolves your address’s own zone and frost dates rather than its county’s.
Virginia Cooperative Extension
For Virginia-specific cultivar recommendations, planting calendars, and pest pressure for wase, the canonical source is Virginia Cooperative Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Wase native to Virginia?
Wase is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-10-19) does not record it growing in Virginia. It can still earn a place in a Virginia garden — the zone comparison above tells you whether it will thrive.
Looking for plants that belong here? The Virginia growing guide lists plants that USDA PLANTS records growing in Virginia 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 Wase in Virginia
When can I plant Wase 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). No sourced winter-hardiness floor is on record for Wase, so this page does not state whether it overwinters in Virginia 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 Wase grown in across Virginia?
Virginia spans USDA hardiness zones 5b-8b (USDA ARS PHZM 2023). Wase is listed for zones 9-11, which do not overlap them, so there is no zone in Virginia where this page can call outdoor growing reliable. A parcel report resolves your own address's zone.
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). Wase needs 125+ 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.
Is Wase native to Virginia?
Wase is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-10-19) does not record it growing in Virginia. It can still earn a place in a Virginia garden — the zone comparison above tells you whether it will thrive.
How should I amend the soil for Wase in Virginia?
Wase 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 Wase actually grow on my specific land in Virginia?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores wase 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 Virginia
State-level data is a sketch. Your Growable Ground report scores wase against your land's mapped soil, modelled sun, drainage, and frost data — not zone averages.
Three things about your lot that Virginia wase 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 wase average
Explore More
Growing guides for wase
Explore Virginia county by county
Virginia carries 133 counties with their own USDA zone — a sample of the growing pages for wase there:
Where else wase grows
Wase'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 1,011 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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