When to plant in Mexico, MO
USDA Zone 6bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Mexico, Missouri — all computed from Mexico's nearest NOAA weather station.
In zone 6b, Mexico gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
MEXICO · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Mexico’s own odds, recorded at MEXICO.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 7 | Apr 23 | Apr 7 | Oct 1 | Oct 15 | Oct 27 |
| 32°F | Apr 26 | Apr 11 | Mar 27 | Oct 13 | Oct 25 | Nov 5 |
| 28°F | Apr 15 | Apr 1 | Mar 15 | Oct 24 | Nov 4 | Nov 18 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Mexico, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 37 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Mexico planting FAQ
When is the last spring frost in Mexico, MO?
Mexico's average last spring frost falls near April 11 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Mexico, MO?
Expect Mexico's first fall frost near October 25 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Mexico in?
Mexico is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Mexico?
Mexico has about 197 frost-free days — a moderate growing season — between the average last spring frost (April 11) and first fall frost (October 25).
When should I plant tomatoes in Mexico?
For Mexico, sow tomatoes indoors about February 14–February 28 and move the seedlings out around April 18, after the last spring frost.
Never miss a window in Mexico
An email when it’s time to start seeds, transplant, and sow — timed to Mexico’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Fulton · 35 km
- Columbia · 46 km
- Moberly · 56 km
- Jefferson City · 71 km
- Hannibal · 74 km
- Troy · 81 km
- Wentzville · 95 km
- Quincy · 96 km
Frost dates recorded at MEXICO, 2 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Mexico, MO — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00235541. Retrieved from https://blissgarden.com/missouri/mexico.