Old Jamestown, Missouri, sits in USDA hardiness zone 7a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
These conditions suit cabbage, hazelnut, california poppy, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Old Jamestown, 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 Old Jamestown 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 Old Jamestown — soil, climate, flood, and parcel records. How we handle your address.
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Old Jamestown — the short answer
Old Jamestown, Missouri: USDA zone 7a, about 240 days between hard freezes, across 10K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 21
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 16
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~240
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 10K 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 Old Jamestown's average, not your lot's — a low corner or a tree line moves it. Against Old Jamestown's 240-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Old Jamestown
Each reading below is measured for Old Jamestown itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredOld Jamestown runs about 240 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredOld Jamestown 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 Old Jamestown is in
Old Jamestown sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Old Jamestown's own centroid rather than borrowed from St. Louis County.
What Grows in Old Jamestown
Every plant below cleared Old Jamestown's own zone 7a and its 240-day season. Each card opens that plant's Missouri profile. How we score.
Is it too late to plant in Old Jamestown?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Feb 21; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 21 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 16 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
Documented around Old Jamestown
Survey cells within 31 miles of Old Jamestown checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 230 miles off. What to watch for.
What's on the federal record near Old Jamestown
Closest first, within ~10 miles of Old Jamestown. Listing isn't leaking, and distance isn't exposure.
- LACLEDE GAS COMPANY-ST LOUIS - SINKS ROADBrownfields · 0.6 mi
- LACLEDE GAS COMPANYUnderground Storage Tanks · 0.6 mi
- T47N R07E 06CBD1Nitrate · 0.8 mi
- SIOUX PASSAGE PARKUnderground Storage Tanks · 0.9 mi
- BEHLMANN NURSERYUnderground Storage Tanks · 1.3 mi
- BP #9054 JAMESTOWN BPUnderground Storage Tanks · 1.3 mi
- MOBIL ON THE RUN #611Underground Storage Tanks · 1.4 mi
- BRITISH BUTLER CLEANERS-FLORISSANTBrownfields · 1.4 mi
- WALGREENS #4866Brownfields · 1.5 mi
- HAZELWOOD SCHOOL DISTRICT TRANSPORTUnderground Storage Tanks · 1.6 mi
- T47N R07E 06ADA1Nitrate · 1.6 mi
- T48N R07E 31DCD1Nitrate · 1.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Old Jamestown'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 Old Jamestown.
Total Sites
1,455
within ~10 miles of Old Jamestown
Risk Level
Elevated
Highest-severity
17 Superfund sites
Sources Checked
within ~10 miles of Old Jamestown
Severity Distribution
within ~10 miles of Old Jamestown
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Old Jamestown, Underground Storage Tanks runs higher than the national average — 899 sites within ~10 miles of Old Jamestown. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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.
Check your specific parcel in Old Jamestown
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 Old Jamestown average
Your land is one point inside Old Jamestown
Everything above resolves to Old Jamestown as a whole — one PHZM band and one 28°F frost record, read across 10K 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 Old Jamestown Average
Old Jamestown Average
- ●USDA Zones 7a, averaged across Old Jamestown
- ●One soil character for all of Old Jamestown
- ●Frost dates read at Old Jamestown's scale: Mar 21 to Nov 16
YOUR Parcel
- ✓Your exact zone, not Old Jamestown's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Old Jamestown
Pull a site-specific report for your exact address in Old Jamestown, Missouri — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Old Jamestown averages can't show:
We read public map data around Old Jamestown — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Old Jamestown average
How we know this about Old Jamestown
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 Old Jamestown’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 Old Jamestown
When does frost risk typically end in Old Jamestown?
The last hard freeze (28°F) in Old Jamestown typically lands around Mar 21, 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 Apr 11.
When is the first frost in Old Jamestown?
The first hard freeze (28°F) in Old Jamestown typically arrives around Nov 16, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 2, so the watching starts about Oct 17 — about 240 days after the spring freeze cleared.
How long is the growing season in Old Jamestown?
Measured between 28°F hard freezes, Old Jamestown sees about 240 frost-free days — roughly Mar 21 through Nov 16, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 11 to Nov 2, about 205 days.
Is the soil safe to grow vegetables in Old Jamestown?
The federal record around Old Jamestown is a meaningful one — 1,455 documented sites, mostly Underground Storage Tanks entries (899), the nearest Brownfields record about 0.6 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 I protect my plants from frost in Old Jamestown?
From about Oct 17 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 Nov 16 (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 Nov 16. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Old Jamestown's scale — its 7a band and its 240-day season. Your yard writes its own version of Old Jamestown'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 Old Jamestown’s own scale
7 of the readings below were taken at Old Jamestown's own scale — its own ~240-day season between 28°F freezes, the 9,565 acres it covers and 1,455 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Old Jamestown's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Old Jamestown's own 28°F hard-freeze dates, about Mar 21 and Nov 16 and the ~240-day span between themNOAA 1991–2020 Climate Normals
- 1,455 documented contamination sites on the federal record near Old Jamestown, the closest Brownfields record about 0.6 miles out from the town centreFederal environmental registers
- Old Jamestown's boundary and the 9,565 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~240-day seasonGrowable Ground crop-matching engine
- The ecoregion at Old Jamestown's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
- Lanternfly survey cells around Old Jamestown checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Old Jamestown's 9,565 acres read through its county's SSURGO summaryfrom St. Louis County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom St. Louis County
- The growing challenges every Missouri grower plans around — written at state scale, so they stay on the state guidefrom Missouri
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom St. Louis County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Old Jamestown's 9,565 acreswhy one lot differs from the next →
- Which side of Old Jamestown you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 9,565 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.6 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 Old Jamestown-wide figureread your own land →
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