Tanacross, Alaska, sits in USDA hardiness zone 3a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Crops well matched to these conditions include cabbage, potato, rhubarb, and kale — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Tanacross, no two yards are alike.
A low spot, a south-facing slope, or a stand of trees moves the frost date and sun across a single Tanacross lot. Enter your address and we'll score 1,086 plants against your land's actual soil, sun, and frost.
We read public map data around Tanacross — soil, climate, flood, and parcel records. How we handle your address.
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Tanacross — the short answer
Tanacross, Alaska: USDA zone 3a, about 85 days between hard freezes, across 51K acres of town.
- USDA zone
- 3a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 31
- Southeast Fairbanks Census Area normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Aug 24
- Southeast Fairbanks Census Area normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~85
- Southeast Fairbanks Census Area normal — NOAA 1991–2020, nearest to this town
- Town area
- 51K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. No 30-year normal resolves at this town’s own centroid, so the hard-freeze dates are Southeast Fairbanks Census Area’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 3a is Tanacross's average, not your lot's — a low corner or a tree line moves it. Against Tanacross's 85-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Tanacross
Each reading below is measured for Tanacross itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsTanacross runs about 85 days between hard freezes (read from Southeast Fairbanks Census Area, the closest normal to Tanacross) — a short growing season.
Long-maturing crops like melons, sweet potatoes, and winter squash can run out of runway before the first hard freeze, ripening late or not at all.
Lead with fast-maturing varieties, and stretch the season on both ends with cold frames, low tunnels, or a greenhouse.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredTanacross sits in USDA hardiness zone 3a.
The zone sets which perennials, shrubs, and fruit trees live through an average winter here — a plant rated for a colder zone is a safe bet, one rated warmer needs winter protection or gets treated as an annual.
Match perennials and fruit to the zone before you buy, so nothing you plant is a gamble against the cold.
USDA PHZM 2023
What Grows in Tanacross
Plants matched to Tanacross's USDA zones 3a, ordered by how much hardiness margin each has here — the ones with room to spare at both ends of this town's band lead. Each links to its full growing profile.
Is it too late to plant in Tanacross?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around May 3; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 31 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Aug 24 — long-season crops need about 90 days of runway, quick greens only 30. In a season this compact, fast finishers and cold-hardy greens do the late work, and garlic tucked in before the freeze repays you next summer.
What's on the federal record near Tanacross
Closest first, within ~10 miles of Tanacross. Listing isn't leaking, and distance isn't exposure.
- AT&T - Paxson AnnexUnderground Storage Tanks · 5.0 mi
- Pump Station #9Underground Storage Tanks · 5.0 mi
- Pump Station #10Underground Storage Tanks · 5.0 mi
- FAA Delta JunctionUnderground Storage Tanks · 5.0 mi
- TANACROSS AIRFIELD USBLMSuperfund · 5.5 mi
- Carson Turbo HelicoptersUnderground Storage Tanks · 5.5 mi
- Tanacross Administrative SiteUnderground Storage Tanks · 7.7 mi
- Tanacross AirfieldUnderground Storage Tanks · 7.7 mi
- CA01801112DACA1 001Nitrate · 9.1 mi
Measured from Tanacross's center, not your beds. Run your own address for what's upwind of you specifically.
Environmental Intelligence
The counts behind that headline — every source type on the record near Tanacross.
Total Sites
10
within ~10 miles of Tanacross
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Severity Distribution
within ~10 miles of Tanacross
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •A Superfund listing means federally documented contamination. Test soil and water before planting edibles nearby.
Check your specific parcel in Tanacross
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,086 plant recommendations.
25+ data sources read at your address, not the Tanacross average
Your land is one point inside Tanacross
Everything above resolves to Tanacross as a whole — one PHZM band, read across 51K acres, with hard-freeze dates borrowed from Southeast Fairbanks Census Area’s record because no 30-year normal resolves at this town’s own centroid. Your parcel is one point inside that footprint. Slope, tree cover, a low spot that pools cold air, and what is in the soil are all resolved at the address, and none of them are visible at town scale. That is the honest boundary of this page, and the reason the next step is a reading of your own ground rather than a better local average.
Your Lot vs the Tanacross Average
Tanacross Average
- ●USDA Zones 3a, averaged across Tanacross
- ●One soil character for all of Tanacross
- ●Frost dates read at Tanacross's scale: May 31 to Aug 24
YOUR Parcel
- ✓Your exact zone, not Tanacross's 3a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Tanacross
Pull a site-specific report for your exact address in Tanacross, Alaska — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Tanacross averages can't show:
We read public map data around Tanacross — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Tanacross average
How we know this about Tanacross
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Southeast Fairbanks Census Area’s record, because none resolves here; boundaries and acreage from US Census TIGER/Line 2025; the contamination records from the federal sources named in their beats above. Soil is not read at town grain anywhere on this page — there is no town-resolution survey in our data, which is why you will find no soil grid here rather than a statewide one wearing a local label. The resolution ledger below names every figure this page inherited.
Common questions about Tanacross
When does frost risk typically end in Tanacross?
The last hard freeze (28°F) in Tanacross typically lands around May 31, per NOAA 1991–2020 climate normals — earlier than the light-frost dates most charts quote. That marks the hard freeze, not the last light frost — lighter frosts keep biting past it, which is why tender transplants here wait until about Jun 21.
When is the first frost in Tanacross?
The first hard freeze (28°F) in Tanacross typically arrives around Aug 24, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Aug 10, so the watching starts about Jul 25 — about 85 days after the spring freeze cleared.
How long is the growing season in Tanacross?
Measured between 28°F hard freezes, Tanacross sees about 85 frost-free days — roughly May 31 through Aug 24, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 21 to Aug 10, about 50 days.
Is the soil safe to grow vegetables in Tanacross?
The federal record around Tanacross is a meaningful one — 10 documented sites, mostly Underground Storage Tanks entries (7), the nearest Underground Storage Tanks record about 5.0 miles out — so a soil test before new food beds is a sensible precaution here, not a reason to hold back from growing. Remember that proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what sits where.
How do gardeners stretch the season in Tanacross?
With about 85 frost-free days between hard freezes, Tanacross rewards the classic extension moves: floating row cover buys roughly two to four extra weeks at each shoulder — on this season that is a working window nearer 113 to 141 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 31 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Tanacross's scale — its 3a band and its 85-day season. Your yard writes its own version of Tanacross's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
What this page reads at Tanacross’s own scale
3 of the readings below were taken at Tanacross's own scale — the 50,629 acres it covers and 10 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Tanacross's own USDA hardiness band, zones 3aUSDA PHZM 2023
- 10 documented contamination sites on the federal record near Tanacross, the closest Underground Storage Tanks record about 5.0 miles out from the town centreFederal environmental registers
- Tanacross's boundary and the 50,629 acres inside itUS Census TIGER/Line 2025
Inherited from a wider read
- The 28°F hard-freeze dates — Tanacross has no normal of its own, so its county's is the closest measured readfrom Southeast Fairbanks Census Area
- Soil character — no town-scale survey exists, so Tanacross's 50,629 acres read through its county's SSURGO summaryfrom Southeast Fairbanks County
- The candidate plant list — Alaska's curated set, filtered to this zone band and re-ordered by how much margin each has herefrom Alaska
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Southeast Fairbanks County
- The growing challenges every Alaska grower plans around — written at state scale, so they stay on the state guidefrom Alaska
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Southeast Fairbanks County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Tanacross's 50,629 acreswhy one lot differs from the next →
- Which side of Tanacross you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 50,629 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 5.0 miles out, measured from the town centrehow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — measured at your address, and averaged away by any Tanacross-wide figureread your own land →