When to plant in Hobart, WI
USDA Zone 5bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Hobart, Wisconsin — all computed from Hobart's nearest NOAA weather station.
In zone 5b, Hobart gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
GREEN BAY WFO · 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 Hobart’s own odds, recorded at GREEN BAY WFO.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 29 | May 14 | Apr 30 | Sep 18 | Sep 30 | Oct 13 |
| 32°F | May 16 | May 1 | Apr 19 | Sep 26 | Oct 11 | Oct 26 |
| 28°F | May 4 | Apr 20 | Apr 6 | Oct 10 | Oct 25 | Nov 6 |
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 Hobart, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 6 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.
Hobart planting FAQ
When is the last spring frost in Hobart, WI?
Plan for the last spring frost in Hobart around May 1 (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 Hobart, WI?
The first fall frost in Hobart typically arrives around October 11 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Hobart in?
Hobart is in USDA hardiness zone 5b. In zone 5b, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in Hobart?
Hobart has about 163 frost-free days — a moderate growing season — between the average last spring frost (May 1) and first fall frost (October 11).
When should I plant tomatoes in Hobart?
For Hobart, sow tomatoes indoors about March 6–March 20 and move the seedlings out around May 8, after the last spring frost.
Never miss a window in Hobart
An email when it’s time to start seeds, transplant, and sow — timed to Hobart’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at GREEN BAY WFO, 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 Hobart, WI — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00473268. Retrieved from https://blissgarden.com/wisconsin/hobart.