Two Rivers, Alaska, sits in USDA hardiness zone 2b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
On paper, cabbage, potato, rhubarb, and kale all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Two Rivers, 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 Two Rivers 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 Two Rivers — soil, climate, flood, and parcel records. How we handle your address.
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Two Rivers — the short answer
Two Rivers, Alaska: USDA zone 2b, about 114 days between hard freezes, across 18K acres of town.
- USDA zone
- 2b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 16
- Fairbanks North Star Borough normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Sep 7
- Fairbanks North Star Borough normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~114
- Fairbanks North Star Borough normal — NOAA 1991–2020, nearest to this town
- Town area
- 18K 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 Fairbanks North Star Borough’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 2b is Two Rivers's average, not your lot's — a low corner or a tree line moves it. Against Two Rivers's 114-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Two Rivers
Each reading below is measured for Two Rivers itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsTwo Rivers runs about 114 days between hard freezes (read from Fairbanks North Star Borough, the closest normal to Two Rivers) — 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
MeasuredTwo Rivers sits in USDA hardiness zone 2b.
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 Two Rivers
Plants matched to Two Rivers's USDA zones 2b, 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 Two Rivers?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Apr 18; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 16 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Sep 7 — long-season crops need about 90 days of runway, quick greens only 30. Short seasons reward decisiveness — quick-maturing varieties late, hardy greens under cover, and next year’s garlic in the ground before it closes.
What's on the federal record near Two Rivers
Closest first, within ~10 miles of Two Rivers. Listing isn't leaking, and distance isn't exposure.
- FA00100334BDCC1 001Nitrate · 1.7 mi
- FNSB - Two Rivers Elementary SchoolUnderground Storage Tanks · 1.9 mi
- FA00100336DBAC1 001Nitrate · 2.0 mi
- FA00100336ADCB1 002Nitrate · 2.0 mi
- FD00100417AACD1 001Nitrate · 5.2 mi
- Pleasant Valley StoreUnderground Storage Tanks · 6.2 mi
- Tack's General StoreUnderground Storage Tanks · 6.4 mi
- Chena Valley DevelopmentUnderground Storage Tanks · 7.8 mi
- Douglas M. GriffithUnderground Storage Tanks · 8.5 mi
- Fish CreekMining · 8.6 mi
- FA00100229BDAD1 001Nitrate · 8.8 mi
- Caribou Creek, WellNitrate · 9.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Two Rivers'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 Two Rivers.
Sources Checked
within ~10 miles of Two Rivers
Severity Distribution
within ~10 miles of Two Rivers
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Two Rivers, two things run higher than the national average within ~10 miles of Two Rivers — Nitrate (18 sites) and Mining (3 sites). That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Two Rivers
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 Two Rivers average
Your land is one point inside Two Rivers
Everything above resolves to Two Rivers as a whole — one PHZM band, read across 18K acres, with hard-freeze dates borrowed from Fairbanks North Star Borough’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 Two Rivers Average
Two Rivers Average
- ●USDA Zones 2b, averaged across Two Rivers
- ●One soil character for all of Two Rivers
- ●Frost dates read at Two Rivers's scale: May 16 to Sep 7
YOUR Parcel
- ✓Your exact zone, not Two Rivers's 2b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Two Rivers
Pull a site-specific report for your exact address in Two Rivers, Alaska — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Two Rivers averages can't show:
We read public map data around Two Rivers — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Two Rivers average
How we know this about Two Rivers
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 Fairbanks North Star Borough’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 Two Rivers
When does frost risk typically end in Two Rivers?
The last hard freeze (28°F) in Two Rivers typically lands around May 16, 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 6.
When is the first frost in Two Rivers?
The first hard freeze (28°F) in Two Rivers typically arrives around Sep 7, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Aug 24, so the watching starts about Aug 8 — about 114 days after the spring freeze cleared.
How long is the growing season in Two Rivers?
Measured between 28°F hard freezes, Two Rivers sees about 114 frost-free days — roughly May 16 through Sep 7, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Jun 6 to Aug 24, about 79 days.
Is the soil safe to grow vegetables in Two Rivers?
The federal record around Two Rivers is light — 30 documented sites across the 9 federal source types we checked, mostly Nitrate entries (18), the nearest Nitrate record about 1.7 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do gardeners stretch the season in Two Rivers?
With about 114 frost-free days between hard freezes, Two Rivers 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 142 to 170 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 16 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Two Rivers's scale — its 2b band and its 114-day season. Your yard writes its own version of Two Rivers'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 Two Rivers’s own scale
3 of the readings below were taken at Two Rivers's own scale — the 17,711 acres it covers and 30 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Two Rivers's own USDA hardiness band, zones 2bUSDA PHZM 2023
- 30 documented contamination sites on the federal record near Two Rivers, the closest Nitrate record about 1.7 miles out from the town centreFederal environmental registers
- Two Rivers's boundary and the 17,711 acres inside itUS Census TIGER/Line 2025
Inherited from a wider read
- The 28°F hard-freeze dates — Two Rivers has no normal of its own, so its county's is the closest measured readfrom Fairbanks North Star Borough
- Soil character — no town-scale survey exists, so Two Rivers's 17,711 acres read through its county's SSURGO summaryfrom Fairbanks North Star 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 Fairbanks North Star 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 Fairbanks North Star County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Two Rivers's 17,711 acreswhy one lot differs from the next →
- Which side of Two Rivers you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 17,711 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 1.7 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 Two Rivers-wide figureread your own land →