When to plant in South Bend, IN
USDA Zone 6aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for South Bend, Indiana — all computed from South Bend's nearest NOAA weather station.
Zone 6a means South Bend sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
S BEND · 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 South Bend’s own odds, recorded at S BEND.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 18 | May 3 | Apr 20 | Sep 28 | Oct 12 | Oct 24 |
| 32°F | May 9 | Apr 23 | Apr 11 | Oct 9 | Oct 23 | Nov 5 |
| 28°F | Apr 28 | Apr 12 | Mar 30 | Oct 21 | Nov 3 | Nov 21 |
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 South Bend, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 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.
South Bend planting FAQ
When is the last spring frost in South Bend, IN?
South Bend's average last spring frost falls near April 23 — 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 South Bend, IN?
The first fall frost in South Bend typically arrives around October 23 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is South Bend in?
South Bend is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in South Bend?
There are roughly 183 frost-free days in South Bend (a moderate growing season), running from the average last frost around April 23 to the first fall frost near October 23.
When should I plant tomatoes in South Bend?
In South Bend, start tomato seeds indoors around February 26–March 12, then transplant seedlings outdoors around April 30 once the danger of frost has passed.
Never miss a window in South Bend
An email when it’s time to start seeds, transplant, and sow — timed to South Bend’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at S BEND, 3 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 South Bend, IN — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00128437. Retrieved from https://blissgarden.com/indiana/south-bend.