Belgium, WI frost dates
Last spring frostMay 5median date
First fall frostOct 12median date
Growing season160 daysfrost-free
Hardiness zone5bZone 5b
How Belgium compares
- In 8 years out of 10, the last spring frost in Belgium falls between April 20 and May 22, a 32-day window. The first fall frost falls between September 27 and October 27.
- The median last frost is the same as the Wisconsin median of May 5.
- Its 160-day growing season is longer than 63% of the 749 Wisconsin places with a regular frost season (state median 155 days).
- The last frost is 4 days later than the zone 5b median of May 1. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5b chart.
- The weather station records an average of 154 nights a year at or below 32°F.
- Compared with Milwaukee, WI, 51 km away, the last frost here is 9 days later than there and the growing season is 19 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 20 |
| 50% (median) | May 5 |
| 10% (safe for tender plants) | May 22 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 27 |
| 50% (median) | October 12 |
| 90% (late) | October 27 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Belgium, WI
Belgium, WI frost dates — last frost May 5, first frost Oct 12, zone 5b. whenisthelastfrost.com
Crop
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Start indoors: Feb 10 to Feb 24Transplant outside: Apr 7 to Apr 21
Start indoors: Feb 24 to Mar 10Transplant outside: May 19 to Jun 2
Start indoors: Feb 24 to Mar 10Transplant outside: May 19 to Jun 2
Start indoors: Mar 10 to Mar 24Transplant outside: May 12 to May 26
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 14 to Apr 28Sow outdoors: Apr 7 to May 12Plant for fall: Aug 17 to Sep 14
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 7 to Apr 21Sow outdoors: Apr 7 to Apr 21Plant for fall: Aug 3 to Aug 24
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 21 to May 5Plant for fall: Jul 6 to Jul 27
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 14 to Apr 28Plant for fall: Jul 6 to Jul 27
Start indoors: Mar 10 to Mar 24Transplant outside: Apr 21 to May 5Plant for fall: Jul 6 to Jul 27
Start indoors: Mar 24 to Apr 7Transplant outside: May 26 to Jun 9Sow outdoors: May 26 to Jun 9
Start indoors: Mar 24 to Apr 7Transplant outside: May 12 to May 26
Sow outdoors: Mar 24 to Apr 14Plant for fall: Jul 20 to Aug 10
Sow outdoors: Mar 24 to Apr 14Plant for fall: Aug 17 to Sep 7
Sow outdoors: Mar 31 to May 12Plant for fall: Aug 31 to Sep 21
Start indoors: Apr 7 to Apr 14Transplant outside: May 19 to May 26Sow outdoors: May 12 to May 26Plant for fall: Jul 27 to Aug 10
Start indoors: Apr 7 to Apr 14Sow outdoors: May 12 to May 26Plant for fall: Aug 3 to Aug 17
Start indoors: Apr 7 to Apr 14Sow outdoors: May 12 to May 26
Start indoors: Apr 7 to Apr 14Transplant outside: May 19 to Jun 2
Sow outdoors: Apr 14 to May 12Plant for fall: Jul 20 to Aug 3
Sow outdoors: Apr 14 to May 12Plant for fall: Aug 3 to Aug 17
Sow outdoors: Apr 14 to May 5
Sow outdoors: Apr 21 to May 19Plant for fall: Aug 3 to Aug 17
Sow outdoors: Apr 21 to May 12Plant for fall: Aug 17 to Sep 7
Sow outdoors: May 12 to Jun 2Plant for fall: Jul 27 to Aug 10
Sow outdoors: May 12 to May 26
Transplant outside: May 19 to Jun 9
Plant for fall: Sep 28 to Nov 2
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Belgium, WI
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 10 – Feb 24 | Apr 7 – Apr 21 | — | — |
| Peppers | Feb 24 – Mar 10 | May 19 – Jun 2 | — | — |
| Eggplant | Feb 24 – Mar 10 | May 19 – Jun 2 | — | — |
| Tomatoes | Mar 10 – Mar 24 | May 12 – May 26 | — | — |
| Lettuce | Mar 10 – Mar 24 | Apr 14 – Apr 28 | Apr 7 – May 12 | Aug 17 – Sep 14 |
| Kale | Mar 10 – Mar 24 | Apr 7 – Apr 21 | Apr 7 – Apr 21 | Aug 3 – Aug 24 |
| Broccoli | Mar 10 – Mar 24 | Apr 21 – May 5 | — | Jul 6 – Jul 27 |
| Cabbage | Mar 10 – Mar 24 | Apr 14 – Apr 28 | — | Jul 6 – Jul 27 |
| Cauliflower | Mar 10 – Mar 24 | Apr 21 – May 5 | — | Jul 6 – Jul 27 |
| Okra | Mar 24 – Apr 7 | May 26 – Jun 9 | May 26 – Jun 9 | — |
| Basil | Mar 24 – Apr 7 | May 12 – May 26 | — | — |
| Peas | — | — | Mar 24 – Apr 14 | Jul 20 – Aug 10 |
| Spinach | — | — | Mar 24 – Apr 14 | Aug 17 – Sep 7 |
| Radishes | — | — | Mar 31 – May 12 | Aug 31 – Sep 21 |
| Cucumbers | Apr 7 – Apr 14 | May 19 – May 26 | May 12 – May 26 | Jul 27 – Aug 10 |
| Zucchini & Summer Squash | Apr 7 – Apr 14 | — | May 12 – May 26 | Aug 3 – Aug 17 |
| Winter Squash & Pumpkins | Apr 7 – Apr 14 | — | May 12 – May 26 | — |
| Melons & Watermelon | Apr 7 – Apr 14 | May 19 – Jun 2 | — | — |
| Carrots | — | — | Apr 14 – May 12 | Jul 20 – Aug 3 |
| Beets | — | — | Apr 14 – May 12 | Aug 3 – Aug 17 |
| Potatoes | — | — | Apr 14 – May 5 | — |
| Swiss Chard | — | — | Apr 21 – May 19 | Aug 3 – Aug 17 |
| Cilantro | — | — | Apr 21 – May 12 | Aug 17 – Sep 7 |
| Green Beans | — | — | May 12 – Jun 2 | Jul 27 – Aug 10 |
| Sweet Corn | — | — | May 12 – May 26 | — |
| Sweet Potatoes | — | May 19 – Jun 9 | — | — |
| Garlic | — | — | — | Sep 28 – Nov 2 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Belgium Wwtp, WI weather station, 2 km away (elevation 732 ft (223 m)).
Frost dates near Belgium
- Cedar Grove May 5 · Oct 12
- Fredonia May 5 · Oct 12
- Port Washington Apr 27 · Oct 22
- Random Lake May 3 · Oct 16
- Oostburg May 3 · Oct 16
- Saukville May 5 · Oct 11
- Hingham May 3 · Oct 16
- Newburg May 4 · Oct 11
- Adell May 3 · Oct 16
- Waldo May 3 · Oct 16
Frequently asked questions
When is the last frost in Belgium, WI?
The median last spring frost in Belgium, WI is May 5. There is still about a 10% chance of frost after May 22, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Belgium, WI?
The median first fall frost is October 12, with about a 10% chance of frost before September 27.
How long is the growing season in Belgium, WI?
About 160 days between the median last spring frost and first fall frost.
What planting zone is Belgium, WI?
Belgium, WI is in USDA hardiness zone 5b.