Seasonal Vegetable Planting Calendar by Region: A 2026 Guide
By Farmers Advisory Editorial Team ·
Published August 4, 2026 · Updated August 4, 2026 · 11 min read ·
Category: Vegetable Farming
The single biggest planting mistake isn't a bad crop choice — it's applying someone else's frost date to your own garden.
A planting calendar that works beautifully in Georgia can wipe out an entire tray of seedlings in
Minnesota. Vegetable timing isn't universal — it's built around two dates that shift dramatically
across the country: your area's average last spring frost and first fall frost. This guide breaks
down a seasonal vegetable planting calendar by region for seven major U.S. growing
areas in 2026, so you can plant by your actual climate instead of a generic "plant in spring" rule
that doesn't account for where you live.
Key Takeaways
Your planting calendar is set by local frost dates, not by a national "spring" or "fall" date — the frost-free growing season ranges from under 100 days in parts of the Mountain West to nearly year-round in the Desert Southwest and Gulf Coast.
Cool-season crops (lettuce, peas, spinach, brassicas) tolerate light frost and go in weeks before the last spring frost; warm-season crops (tomatoes, peppers, squash) are killed by frost and wait until it has passed.
Most regions support two planting windows — a spring cool-season crop and a fall cool-season crop — bracketing a single summer warm-season planting.
Desert Southwest and South Texas growers effectively invert the calendar: summer heat, not frost, is the limiting factor, so the main vegetable season runs fall through spring.
USDA hardiness zones describe winter cold survival for perennials; frost dates, not zone numbers alone, are what actually determine annual vegetable planting dates.
Frost Dates and Growing Seasons by Region (2026)
Approximate Average Frost Dates and Frost-Free Season by Region
Region
Avg. Last Spring Frost
Avg. First Fall Frost
Frost-Free Season
Northeast / Upper Midwest
Late April – mid-May
Late September – mid-October
~140-160 days
Mid-Atlantic / Ohio Valley
Mid-April
Mid-October
~170-190 days
Southeast / Gulf Coast
Mid-March – early April
Late October – November
~220-260 days
Desert Southwest / South Texas
Late February – March
November – December (some areas frost-free)
~260-300+ days
Pacific Northwest (west side)
Mid-April
Late October
~180-200 days
Mountain West / High Plains
Mid-May – early June
Mid-September
~90-120 days
These are 30-year averages, not guarantees for a given year — always confirm against your county
extension office or a local frost-date lookup before committing tender transplants to the ground.
💡 Quick Tip
Write your two frost dates on your seed packets or garden calendar before the season starts. Nearly every planting instruction — start indoors, direct sow, transplant, harvest — is calculated as a number of weeks before or after one of those two dates.
1. USDA Zones vs. Frost Dates: What Actually Sets Your Calendar
USDA Plant Hardiness Zones rank areas by average annual minimum winter temperature and are built to
answer one question: will a perennial plant survive the winter where you live. They're the right tool
for choosing fruit trees, berry bushes, or asparagus crowns.
For annual vegetables, though, the number that matters is your area's average frost date, not its
zone number. Two towns can share the same zone yet have last-frost dates two or three weeks apart
because of elevation, distance from a coastline, or a valley that traps cold air. Zone maps also say
nothing about summer heat — a factor that matters enormously in desert and Gulf Coast climates, where
it's high summer temperatures, not frost, that end the cool-season crop window.
Use your hardiness zone to select perennial crops and to get a rough sense of season length
Use your local last and first frost dates to actually schedule sowing, transplanting, and harvest
Confirm both figures with a state land-grant university extension office, which typically publishes county-level planting calendars more precise than any national average
2. Cool-Season vs. Warm-Season Vegetables
Every vegetable falls into one of two temperature categories, and that category — more than the
calendar month — determines when it goes in the ground.
After last spring frost, once nighttime soil stays above roughly 50°F
Cool-season crops actually suffer in sustained summer heat — they bolt (flower and turn bitter)
once temperatures climb, which is why they get two windows a year in most regions rather than one
continuous season.
3. Northeast and Upper Midwest
Covering New England, upstate New York, the Great Lakes states, and the Upper Midwest, this region
has one of the shorter frost-free windows outside the mountains, generally running from late April or
mid-May to late September or mid-October.
Late winter (6-10 weeks before last frost): start tomato, pepper, and eggplant seeds indoors under grow lights
Early spring (4-6 weeks before last frost): direct-sow peas, spinach, and radishes; transplant onion sets
After last frost: transplant tomatoes, peppers, and squash once nights stay reliably above 50°F, usually a week or two past the average date as insurance
Mid-to-late summer (10-12 weeks before first fall frost): sow a second round of lettuce, kale, and other fall greens
4. Mid-Atlantic, Ohio Valley and Central Plains
This band — Virginia through southern Pennsylvania, the Ohio Valley, and the central Plains states —
typically clears frost by mid-April and doesn't see it return until mid-October, giving roughly six
months of open ground.
Early spring: direct-sow peas, lettuce, and root vegetables 3-4 weeks before last frost
Mid-spring: transplant cabbage-family seedlings 2-3 weeks before last frost, since they tolerate light frost well
Late spring: set out tomatoes, peppers, and vining crops once frost risk has passed
Summer heat: the region's humid summers favor disease in crowded plantings — space plants for airflow and consider a second tomato planting for a fall crop in the longer parts of this zone
5. Southeast and Gulf Coast
The Southeast and Gulf Coast enjoy one of the longest frost-free seasons in the continental U.S.,
often 220-260 days, which supports three planting windows rather than two in much of the region.
Late winter: direct-sow cool-season crops as early as mid-to-late February in the Deep South
Spring: transplant warm-season crops from mid-March onward as frost risk clears
Summer: intense heat and humidity stress many crops — okra, sweet potatoes, and Southern peas thrive where tomatoes and lettuce struggle
Fall: a second cool-season planting from September into November often outperforms the spring one, since cooler, more stable temperatures reduce bolting and disease pressure
6. Desert Southwest and South Texas
⚠️ Common Mistake
Treating this region's calendar like everywhere else's. In the low desert and South Texas, summer heat — not winter frost — is the crop-killing extreme, and the main vegetable season effectively runs fall through spring instead of spring through fall.
Fall (September-October): the primary planting season begins as extreme heat breaks — sow cool-season crops and warm-season crops that need a head start before the mild winter
Winter: many warm-season crops, including tomatoes and peppers, can grow through a frost-free desert winter with minimal protection
Early spring: a second warm-season planting window opens before summer heat becomes prohibitive
Summer: most vegetables stop producing or bolt in sustained 100°F+ heat; only a handful of heat-adapted crops keep going
7. Pacific Northwest and Northern California Coast
West of the Cascades and along the Northern California coast, a maritime climate brings mild, wet
winters and cool, dry summers — a genuinely different pattern from same-zone regions elsewhere in the
country.
Early spring: cool, moist soil favors peas, lettuce, and brassicas well before the mid-April last frost in many valley locations
Late spring: tomatoes and peppers benefit from being started indoors earlier than the frost date suggests, since summer heat units accumulate more slowly here than in continental climates
Cool summers: select shorter-season tomato and pepper varieties bred for lower heat accumulation rather than assuming a long hot summer
Fall/winter: mild coastal winters support a genuine second growing season for hardy greens and brassicas rather than a full shutdown
8. Mountain West and High Plains
Higher elevations across the Rockies, the Intermountain West, and the High Plains have the shortest
frost-free seasons in the country outside the far north, sometimes under 100 days, with frost possible
even in June at high elevation.
Indoor starts: begin tomatoes, peppers, and other long-season crops 8-10 weeks before the last frost, since outdoor time is limited
After last frost: transplant warm-season crops promptly, often using row cover or cold frames to buffer late cold snaps
Choose short-season varieties: crops bred for 60-75 day maturity are far more reliable here than 90-day varieties common in longer-season regions
Watch nights, not just days: wide daily temperature swings and sudden cold fronts are common even mid-summer at elevation
9. Succession Planting and Fall Crops
In every region except the shortest-season Mountain West areas, a single spring planting leaves
usable growing time on the table. Succession planting — sowing a new round of a crop every few weeks,
or switching to a different crop as the season progresses — keeps beds productive from spring through
fall rather than producing one harvest and going idle.
Count backward from your first fall frost date to time a fall cool-season planting — most greens and root crops need 6-8 weeks of cool growing time before that date
Succession-sow fast crops like lettuce and radishes every 2-3 weeks through the cooler parts of the season for a continuous harvest instead of one large glut
In long-season regions, a second planting of bush beans or summer squash in mid-summer often outproduces the spring planting, since it avoids early-season pest pressure
Frequently Asked Questions
How do I find my exact frost dates instead of a regional average?
Check your state's land-grant university extension office or a frost-date lookup tool using
your ZIP code. Regional averages in this guide are a starting point — local elevation, urban heat,
and nearby water can shift your actual dates by a week or more.
Is it better to go by USDA zone or by frost date when planning what to plant?
Use your USDA zone for perennial crops like fruit trees and asparagus, since it reflects winter
survival. Use your local frost dates for annual vegetables, since those dates — not the zone number
— determine when it's safe to sow or transplant.
Can I plant warm-season crops before the last frost date if the forecast looks warm?
It's risky. A single unseasonably warm week doesn't rule out a late frost, and one cold night can
kill an entire planting of tomatoes or peppers. Waiting one to two weeks past the average last frost
date is a common safety margin.
Why do cool-season crops get planted twice a year in most regions?
Cool-season crops like lettuce and spinach bolt and turn bitter once summer heat arrives, so most
regions plant them in early spring before the heat and again in late summer or early fall as
temperatures cool back down.
Does the Desert Southwest really have a different planting calendar than the rest of the country?
Yes. In the low desert and South Texas, extreme summer heat rather than winter frost limits the
growing season, so the main vegetable-growing period runs from fall through spring instead of
spring through fall as in most of the country.
Conclusion
A planting calendar only works when it's built around the climate you're actually gardening in.
Start with your region's average last and first frost dates, sort your crops into cool-season and
warm-season groups, and time each planting relative to those two dates rather than a fixed calendar
month. From there, most of the country supports at least two productive plantings a year — and in the
Desert Southwest and Gulf Coast, sometimes three — as long as the calendar matches the region rather
than a one-size-fits-all national average.
Want more vegetable farming tips delivered to your inbox every week?
Data sources: USDA Agricultural Research Service, Plant Hardiness Zone Map (2023 revision); The Old
Farmer's Almanac, frost date data and 2026 Frost Date Map; National Centers for Environmental
Information (NOAA), first fall freeze regional outlook; Farmers' Almanac average frost date records;
Cornell University Northeast Regional Climate Center frost data; and regional cooperative extension
planting guides. Figures are 30-year regional averages and vary by elevation, microclimate, and local
conditions. Current as of August 4, 2026.
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