When to plant in Bridgeton, MO
USDA Zone 6bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Bridgeton, Missouri — all computed from Bridgeton's nearest NOAA weather station.
Zone 6b means Bridgeton sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
ST LOUIS LAMBERT INTL AP · 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 Bridgeton’s own odds, recorded at ST LOUIS LAMBERT INTL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 28 | Apr 13 | Mar 31 | Oct 14 | Oct 26 | Nov 6 |
| 32°F | Apr 17 | Apr 2 | Mar 17 | Oct 23 | Nov 4 | Nov 18 |
| 28°F | Apr 7 | Mar 23 | Mar 5 | Nov 2 | Nov 13 | Nov 30 |
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 Bridgeton, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 13 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.
Bridgeton planting FAQ
When is the last spring frost in Bridgeton, MO?
Bridgeton's average last spring frost falls near April 2 — 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 Bridgeton, MO?
Expect Bridgeton's first fall frost near November 4 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Bridgeton in?
Bridgeton 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 Bridgeton?
There are roughly 216 frost-free days in Bridgeton (a long growing season), running from the average last frost around April 2 to the first fall frost near November 4.
When should I plant tomatoes in Bridgeton?
In Bridgeton, start tomato seeds indoors around February 5–February 19, then transplant seedlings outdoors around April 9 once the danger of frost has passed.
Never miss a window in Bridgeton
An email when it’s time to start seeds, transplant, and sow — timed to Bridgeton’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Hazelwood · 3 km
- St. Ann · 6 km
- Maryland Heights · 8 km
- Florissant · 8 km
- St. Charles · 9 km
- Overland · 10 km
- Ferguson · 11 km
- Creve Coeur · 13 km
Frost dates recorded at ST LOUIS LAMBERT INTL AP, 4 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 Bridgeton, MO — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00013994. Retrieved from https://blissgarden.com/missouri/bridgeton.