Newcomb, New Mexico, sits in USDA hardiness zone 7a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
On paper, cabbage, pawpaw, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Newcomb, 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 Newcomb 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 Newcomb — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Newcomb — the short answer
Newcomb, New Mexico: USDA zone 7a, about 190 days between hard freezes, across 6K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~190
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 6K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 7a is Newcomb's average, not your lot's — a low corner or a tree line moves it. Against Newcomb's 190-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Newcomb
Each reading below is measured for Newcomb itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNewcomb runs about 190 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredNewcomb sits in USDA hardiness zone 7a.
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
The kind of country Newcomb is in
Newcomb sits in the Arizona/New Mexico Plateau — EPA Level III, inside the wider North American Deserts. That is read at Newcomb's own centroid rather than borrowed from San Juan County.
What Grows in Newcomb
Every plant below cleared Newcomb's own zone 7a and its 190-day season. Each card opens that plant's New Mexico profile. How we score.
Is it too late to plant in Newcomb?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 21; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 18 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 25 — long-season crops need about 90 days of runway, quick greens only 30. Late in the year the fall bench takes over — quick greens, radishes, and garlic that repays you next summer.
What's on the federal record near Newcomb
Closest first, within ~10 miles of Newcomb. Listing isn't leaking, and distance isn't exposure.
- NR049.1148X1468Nitrate · 1700 ft
- NR067.0830X0030Nitrate · 4.4 mi
- NR049.0675X1555Nitrate · 5.0 mi
- 24N.19W.24.41 12T-640Nitrate · 5.7 mi
- NR050.0348X1350Nitrate · 5.8 mi
- NR050.0378X1562 12T-632Nitrate · 6.0 mi
- NR068.0295X0080Nitrate · 6.0 mi
- NR068.0310X0110Nitrate · 6.3 mi
- NR068.0220X0270Nitrate · 6.5 mi
- NR067.1150X0425Nitrate · 6.7 mi
- NR068.0070X0440Nitrate · 7.2 mi
- NR068.0305X0285Nitrate · 7.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Newcomb'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 Newcomb.
Total Sites
56
within ~10 miles of Newcomb
Risk Level
Moderate
Highest-severity
56 nitrate monitoring sites
Severity Distribution
within ~10 miles of Newcomb
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Newcomb, Nitrate runs higher than the national average — 56 sites within ~10 miles of Newcomb. 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.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Newcomb
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 Newcomb average
Your land is one point inside Newcomb
Everything above resolves to Newcomb as a whole — one PHZM band and one 28°F frost record, read across 6K acres. 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 Newcomb Average
Newcomb Average
- ●USDA Zones 7a, averaged across Newcomb
- ●One soil character for all of Newcomb
- ●Frost dates read at Newcomb's scale: Apr 18 to Oct 25
YOUR Parcel
- ✓Your exact zone, not Newcomb's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Newcomb
Pull a site-specific report for your exact address in Newcomb, New Mexico — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Newcomb averages can't show:
We read public map data around Newcomb — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Newcomb average
How we know this about Newcomb
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 Newcomb’s own record; 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 Newcomb
When does frost risk typically end in Newcomb?
The last hard freeze (28°F) in Newcomb typically lands around Apr 18, 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 May 9.
When is the first frost in Newcomb?
The first hard freeze (28°F) in Newcomb typically arrives around Oct 25, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 11, so the watching starts about Sep 25 — about 190 days after the spring freeze cleared.
How long is the growing season in Newcomb?
Measured between 28°F hard freezes, Newcomb sees about 190 frost-free days — roughly Apr 18 through Oct 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 9 to Oct 11, about 155 days.
Is the soil safe to grow vegetables in Newcomb?
The federal record around Newcomb shows 56 documented sites, mostly Nitrate entries (56), the nearest Nitrate record about 0.3 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Newcomb?
From about Sep 25 the job here turns from planting to protecting — the last start even a 30-day crop can finish. As the season closes around the first 28°F hard freeze near Oct 25 (NOAA 1991–2020 climate normals), three moves buy time: row cover or an old sheet over tender plants on still, clear nights; water the soil the afternoon before a freeze, so it holds warmth overnight; and harvest tomatoes, peppers and basil before Oct 25. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Newcomb's scale — its 7a band and its 190-day season. Your yard writes its own version of Newcomb'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 Newcomb’s own scale
6 of the readings below were taken at Newcomb's own scale — its own ~190-day season between 28°F freezes, the 6,195 acres it covers and 56 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Newcomb's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Newcomb's own 28°F hard-freeze dates, about Apr 18 and Oct 25 and the ~190-day span between themNOAA 1991–2020 Climate Normals
- 56 documented contamination sites on the federal record near Newcomb, the closest Nitrate record about 0.3 miles out from the town centreFederal environmental registers
- Newcomb's boundary and the 6,195 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~190-day seasonGrowable Ground crop-matching engine
- The ecoregion at Newcomb's own centroid, the Arizona/New Mexico PlateauUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Newcomb's 6,195 acres read through its county's SSURGO summaryfrom San Juan County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom San Juan County
- The growing challenges every New Mexico grower plans around — written at state scale, so they stay on the state guidefrom New Mexico
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom San Juan County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Newcomb's 6,195 acreswhy one lot differs from the next →
- Which side of Newcomb you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 6,195 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.3 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 Newcomb-wide figureread your own land →