When to plant in Rolla, MO
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Rolla, Missouri — is derived from the closest NOAA station with complete climate normals.
Zone 6b means Rolla sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
ROLLA MISSOURI S&T · 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 Rolla’s own odds, recorded at ROLLA MISSOURI S&T.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 2 | Apr 18 | Apr 1 | Oct 7 | Oct 21 | Nov 1 |
| 32°F | Apr 22 | Apr 5 | Mar 21 | Oct 18 | Nov 1 | Nov 15 |
| 28°F | Apr 10 | Mar 26 | Mar 10 | Oct 28 | Nov 10 | Nov 28 |
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 Rolla, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 34 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.
Rolla planting FAQ
When is the last spring frost in Rolla, MO?
Plan for the last spring frost in Rolla around April 5 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Rolla, MO?
In Rolla, the first 32°F freeze of fall lands around November 1 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Rolla in?
Rolla 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 Rolla?
There are roughly 210 frost-free days in Rolla (a moderate growing season), running from the average last frost around April 5 to the first fall frost near November 1.
When should I plant tomatoes in Rolla?
In Rolla, start tomato seeds indoors around February 8–February 22, then transplant seedlings outdoors around April 12 once the danger of frost has passed.
Never miss a window in Rolla
An email when it’s time to start seeds, transplant, and sow — timed to Rolla’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Fort Leonard Wood · 38 km
- Jefferson City · 78 km
- Lebanon · 85 km
- Union · 86 km
- Washington · 94 km
- Fulton · 102 km
- Eureka · 115 km
- Wildwood · 118 km
Frost dates recorded at ROLLA MISSOURI S&T, 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 Rolla, MO — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00237263. Retrieved from https://blissgarden.com/missouri/rolla.