When to plant in Spanish Lake, MO
USDA Zone 7aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Spanish Lake, Missouri — all computed from Spanish Lake's nearest NOAA weather station.
In zone 7a, Spanish Lake supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
ALTON - MELVIN PRICE L&D · 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 Spanish Lake’s own odds, recorded at ALTON - MELVIN PRICE L&D.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 1 | Apr 14 | Mar 31 | Oct 12 | Oct 27 | Nov 8 |
| 32°F | Apr 19 | Apr 4 | Mar 18 | Oct 25 | Nov 5 | Nov 21 |
| 28°F | Apr 9 | Mar 25 | Mar 6 | Nov 2 | Nov 16 | Dec 1 |
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 Spanish Lake, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 18 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.
Spanish Lake planting FAQ
When is the last spring frost in Spanish Lake, MO?
Spanish Lake's average last spring frost falls near April 4 — 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 Spanish Lake, MO?
The first fall frost in Spanish Lake typically arrives around November 5 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Spanish Lake in?
Spanish Lake is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Spanish Lake?
Spanish Lake has about 215 frost-free days — a long growing season — between the average last spring frost (April 4) and first fall frost (November 5).
When should I plant tomatoes in Spanish Lake?
For Spanish Lake, sow tomatoes indoors about February 7–February 21 and move the seedlings out around April 11, after the last spring frost.
Never miss a window in Spanish Lake
An email when it’s time to start seeds, transplant, and sow — timed to Spanish Lake’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Bellefontaine Neighbors · 4 km
- Old Jamestown · 8 km
- Jennings · 9 km
- Ferguson · 9 km
- Granite City · 10 km
- Florissant · 10 km
- Alton · 14 km
- Wood River · 14 km
Frost dates recorded at ALTON - MELVIN PRICE L&D, 10 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 Spanish Lake, MO — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00110137. Retrieved from https://blissgarden.com/missouri/spanish-lake.