Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for Maryville, TN

Maryville, TN is in USDA zone 7b across its 4 ZIP codes. The median last spring frost is April 1 and the first fall frost November 2.

Maryville on the zone map

Outlined: its 3 ZIP code areas · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone7b5 to 10 °F
ZIP codes4
Last frostApr 1
First frostNov 2
Growing season215 days

7b 4 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

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Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates in Maryville, TN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 1median — 50% chance of a later frost
Safe for tender plantsApril 17only 10% chance of frost after
First fall frostNovember 2median — 10% chance by Oct 21
Growing season215 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 19 and returns around November 13.

From the NOAA station Knoxville Mcghee Tyson Airport, TN, elevation 961 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in Maryville

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 18 – Mar 4
SpinachSow outdoors · Feb 18 – Mar 11
Broccoli, cabbageStart indoors · Jan 21 – Feb 4
Broccoli, cabbageTransplant · Mar 11 – Mar 25
Onion setsPlant outdoors · Mar 4 – Mar 18
PotatoesPlant outdoors · Mar 11 – Mar 25
LettuceSow outdoors · Mar 4 – Mar 18
Carrots, beetsSow outdoors · Mar 11 – Mar 25
TomatoesStart indoors · Feb 4 – Feb 18
TomatoesTransplant · Apr 8 – Apr 22
Peppers, eggplantStart indoors · Jan 21 – Feb 4
Peppers, eggplantTransplant · Apr 15 – Apr 29
BeansSow outdoors · Apr 8 – Apr 22
Sweet cornSow outdoors · Apr 8 – Apr 22
Cucumbers, squashSow outdoors · Apr 8 – Apr 22
Fall lettuce, spinachSow outdoors · Sep 7 – Sep 21
GarlicPlant cloves · Oct 19 – Nov 23
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 1) and first fall frost (Nov 2) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 37802 came on Feb 21 — 3 days earlier than the 1991–2020 average (Feb 24).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Native plants for zone 7b in Tennessee

566 plants native to the lower 48 states, recorded in Tennessee, and rated by the USDA to survive 5 °F or colder — the bottom of zone 7b. Each links to its USDA PLANTS profile.

Trees 82

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 116

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °F

Wildflowers & perennials 184

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °FAmerican spongeplant0.5 ft · blooms mid spring · high shade tolerance · to −24 °F

Grasses 157

American cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fbluejoint5 ft · blooms late spring · high shade tolerance · to −33 °F

Vines 14

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fcupseed30 ft · blooms late spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °F

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Maryville, TN.

Soil in Maryville, TN

The soil mapped at the center of ZIP 37802 is Dewey — silty clay loam, well drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH5.5moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classFarmland of local importanceUSDA classification

Map unit: Dewey-Collegedale complex, 6 to 15 percent slopes, severely eroded.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 37802; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Maryville, TN

Summer high88 °Faverage high, July
Winter low30 °Faverage low, January
Hot days37days a year at 90 °F or more
Freezing nights67nights a year at 32 °F or less
Growing degree days4,664base 50 °F — the season’s usable heat
Longest day14 h 35 mindaylight on June 21
Shortest day9 h 44 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation54 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 48 °F, low 30 °F 48°30° JanFebruary: average high 53 °F, low 33 °F 53°33° FebMarch: average high 61 °F, low 40 °F 61°40° MarApril: average high 71 °F, low 48 °F 71°48° AprMay: average high 79 °F, low 57 °F 79°57° MayJune: average high 86 °F, low 65 °F 86°65° JunJuly: average high 88 °F, low 69 °F 88°69° JulAugust: average high 88 °F, low 68 °F 88°68° AugSeptember: average high 83 °F, low 61 °F 83°61° SepOctober: average high 72 °F, low 49 °F 72°49° OctNovember: average high 60 °F, low 38 °F 60°38° NovDecember: average high 51 °F, low 33 °F 51°33° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 4.31 in precipitation 4.3 JanFebruary: 4.75 in precipitation 4.8 FebMarch: 5.07 in precipitation 5.1 MarApril: 4.71 in precipitation 4.7 AprMay: 4.29 in precipitation 4.3 MayJune: 4.87 in precipitation 4.9 JunJuly: 5.82 in precipitation 5.8 JulAugust: 4.00 in precipitation 4.0 AugSeptember: 3.89 in precipitation 3.9 SepOctober: 2.77 in precipitation 2.8 OctNovember: 4.19 in precipitation 4.2 NovDecember: 5.32 in precipitation 5.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Knoxville Mcghee Tyson Airport, TN (4 mi away); precipitation: Maryville 3.4 Ese, TN (4 mi away). Daylight is calculated from latitude.

ZIP codes in Maryville

378017b
5 to 10 °F
378027b
5 to 10 °F
378037b
5 to 10 °F
378047b
5 to 10 °F

Tennessee planting zones →

Questions about Maryville

What planting zone is Maryville, TN?

Maryville, TN is in USDA hardiness zone 7b on the 2023 map (7b: 5 to 10 °F).

When is the last frost in Maryville, TN?

The median last spring frost is April 1 and the median first fall frost is November 2 (NOAA 1991–2020 normals, Knoxville Mcghee Tyson Airport station).

When can I plant a garden in Maryville, TN?

Cool-season crops like peas and spinach go in around Feb 18 – Mar 11; tomatoes, peppers, beans and squash after about Apr 8, once frost risk has passed.

What kind of onions grow in Maryville, TN?

Intermediate onions: the longest day is 14 h 35 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

How much rain and snow does Maryville, TN get?

About 54 inches of precipitation a year (NOAA 1991–2020 normals).