Greenbush, WI frost dates
Last spring frostMay 3median date
First fall frostOct 10median date
Growing season160 daysfrost-free
Hardiness zone5bZone 5b
How Greenbush compares
- In 8 years out of 10, the last spring frost in Greenbush falls between April 19 and May 20, a 31-day window. The first fall frost falls between September 28 and October 25.
- The median last frost is 2 days earlier than 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 typical for zone 5b, where the median is May 1.
- The weather station records an average of 151 nights a year at or below 32°F.
- Compared with Oshkosh, WI, 50 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 19 |
| 50% (median) | May 3 |
| 10% (safe for tender plants) | May 20 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 28 |
| 50% (median) | October 10 |
| 90% (late) | October 25 |
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 Greenbush, WI
Greenbush, WI frost dates — last frost May 3, first frost Oct 10, zone 5b. whenisthelastfrost.com
Crop
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Start indoors: Feb 8 to Feb 22Transplant outside: Apr 5 to Apr 19
Start indoors: Feb 22 to Mar 8Transplant outside: May 17 to May 31
Start indoors: Feb 22 to Mar 8Transplant outside: May 17 to May 31
Start indoors: Mar 8 to Mar 22Transplant outside: May 10 to May 24
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 12 to Apr 26Sow outdoors: Apr 5 to May 10Plant for fall: Aug 15 to Sep 12
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 5 to Apr 19Sow outdoors: Apr 5 to Apr 19Plant for fall: Aug 1 to Aug 22
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 19 to May 3Plant for fall: Jul 4 to Jul 25
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 4 to Jul 25
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 19 to May 3Plant for fall: Jul 4 to Jul 25
Start indoors: Mar 22 to Apr 5Transplant outside: May 24 to Jun 7Sow outdoors: May 24 to Jun 7
Start indoors: Mar 22 to Apr 5Transplant outside: May 10 to May 24
Sow outdoors: Mar 22 to Apr 12Plant for fall: Jul 18 to Aug 8
Sow outdoors: Mar 22 to Apr 12Plant for fall: Aug 15 to Sep 5
Sow outdoors: Mar 29 to May 10Plant for fall: Aug 29 to Sep 19
Start indoors: Apr 5 to Apr 12Transplant outside: May 17 to May 24Sow outdoors: May 10 to May 24Plant for fall: Jul 25 to Aug 8
Start indoors: Apr 5 to Apr 12Sow outdoors: May 10 to May 24Plant for fall: Aug 1 to Aug 15
Start indoors: Apr 5 to Apr 12Sow outdoors: May 10 to May 24
Start indoors: Apr 5 to Apr 12Transplant outside: May 17 to May 31
Sow outdoors: Apr 12 to May 10Plant for fall: Jul 18 to Aug 1
Sow outdoors: Apr 12 to May 10Plant for fall: Aug 1 to Aug 15
Sow outdoors: Apr 12 to May 3
Sow outdoors: Apr 19 to May 17Plant for fall: Aug 1 to Aug 15
Sow outdoors: Apr 19 to May 10Plant for fall: Aug 15 to Sep 5
Sow outdoors: May 10 to May 31Plant for fall: Jul 25 to Aug 8
Sow outdoors: May 10 to May 24
Transplant outside: May 17 to Jun 7
Plant for fall: Sep 26 to Oct 31
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Greenbush, WI
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 8 – Feb 22 | Apr 5 – Apr 19 | — | — |
| Peppers | Feb 22 – Mar 8 | May 17 – May 31 | — | — |
| Eggplant | Feb 22 – Mar 8 | May 17 – May 31 | — | — |
| Tomatoes | Mar 8 – Mar 22 | May 10 – May 24 | — | — |
| Lettuce | Mar 8 – Mar 22 | Apr 12 – Apr 26 | Apr 5 – May 10 | Aug 15 – Sep 12 |
| Kale | Mar 8 – Mar 22 | Apr 5 – Apr 19 | Apr 5 – Apr 19 | Aug 1 – Aug 22 |
| Broccoli | Mar 8 – Mar 22 | Apr 19 – May 3 | — | Jul 4 – Jul 25 |
| Cabbage | Mar 8 – Mar 22 | Apr 12 – Apr 26 | — | Jul 4 – Jul 25 |
| Cauliflower | Mar 8 – Mar 22 | Apr 19 – May 3 | — | Jul 4 – Jul 25 |
| Okra | Mar 22 – Apr 5 | May 24 – Jun 7 | May 24 – Jun 7 | — |
| Basil | Mar 22 – Apr 5 | May 10 – May 24 | — | — |
| Peas | — | — | Mar 22 – Apr 12 | Jul 18 – Aug 8 |
| Spinach | — | — | Mar 22 – Apr 12 | Aug 15 – Sep 5 |
| Radishes | — | — | Mar 29 – May 10 | Aug 29 – Sep 19 |
| Cucumbers | Apr 5 – Apr 12 | May 17 – May 24 | May 10 – May 24 | Jul 25 – Aug 8 |
| Zucchini & Summer Squash | Apr 5 – Apr 12 | — | May 10 – May 24 | Aug 1 – Aug 15 |
| Winter Squash & Pumpkins | Apr 5 – Apr 12 | — | May 10 – May 24 | — |
| Melons & Watermelon | Apr 5 – Apr 12 | May 17 – May 31 | — | — |
| Carrots | — | — | Apr 12 – May 10 | Jul 18 – Aug 1 |
| Beets | — | — | Apr 12 – May 10 | Aug 1 – Aug 15 |
| Potatoes | — | — | Apr 12 – May 3 | — |
| Swiss Chard | — | — | Apr 19 – May 17 | Aug 1 – Aug 15 |
| Cilantro | — | — | Apr 19 – May 10 | Aug 15 – Sep 5 |
| Green Beans | — | — | May 10 – May 31 | Jul 25 – Aug 8 |
| Sweet Corn | — | — | May 10 – May 24 | — |
| Sweet Potatoes | — | May 17 – Jun 7 | — | — |
| Garlic | — | — | — | Sep 26 – Oct 31 |
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 Plymouth Wwtp, WI weather station, 10 km away (elevation 827 ft (252 m)).
Frost dates near Greenbush
- Glenbeulah May 3 · Oct 10
- Saint Cloud May 3 · Oct 10
- Plymouth May 3 · Oct 10
- Elkhart Lake May 3 · Oct 10
- Cascade May 3 · Oct 10
- Mount Calvary May 1 · Oct 12
- Waldo May 3 · Oct 16
- Adell May 3 · Oct 16
- Kiel May 1 · Oct 14
- Malone May 1 · Oct 12
Frequently asked questions
When is the last frost in Greenbush, WI?
The median last spring frost in Greenbush, WI is May 3. There is still about a 10% chance of frost after May 20, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Greenbush, WI?
The median first fall frost is October 10, with about a 10% chance of frost before September 28.
How long is the growing season in Greenbush, WI?
About 160 days between the median last spring frost and first fall frost.
What planting zone is Greenbush, WI?
Greenbush, WI is in USDA hardiness zone 5b.