When to plant Onion sets in Kansas
In spring, from Feb 15 – Mar 20 in Kansas City to Mar 10 – Apr 1 in Winfield.
In fall: USDA's 1967 table lists onion sets as generally spring-planted in every place here. Newer advice from your state's extension service may differ.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring |
|---|---|
| Andover | Mar 1 – Apr 1 |
| Arkansas City | Mar 1 – Apr 1 |
| Atchison | Mar 1 – Apr 1 |
| Bel Aire | Mar 1 – Apr 1 |
| Derby | Mar 1 – Apr 1 |
| Dodge City | Mar 10 – Apr 1 |
| El Dorado | Mar 1 – Apr 1 |
| Emporia | Mar 1 – Apr 1 |
| Garden City | Mar 10 – Apr 10 |
| Gardner | Mar 1 – Apr 1 |
| Great Bend | Mar 10 – Apr 1 |
| Hays | Mar 10 – Apr 1 |
| Haysville | Mar 1 – Apr 1 |
| Hutchinson | Mar 10 – Apr 1 |
| Junction City | Mar 1 – Apr 1 |
| Kansas City | Feb 15 – Mar 20 |
| Lansing | Mar 10 – Apr 1 |
| Lawrence | Mar 1 – Apr 1 |
| Leavenworth | Mar 1 – Apr 1 |
| Leawood | Mar 1 – Apr 1 |
| Lenexa | Mar 1 – Apr 1 |
| Liberal | Mar 10 – Apr 1 |
| Manhattan | Mar 10 – Apr 1 |
| McPherson | Mar 10 – Apr 1 |
| Merriam | Feb 15 – Mar 20 |
| Mission | Feb 15 – Mar 20 |
| Newton | Mar 1 – Apr 1 |
| Olathe | Mar 1 – Apr 1 |
| Ottawa | Mar 10 – Apr 1 |
| Overland Park | Mar 1 – Apr 1 |
| Pittsburg | Mar 1 – Apr 1 |
| Prairie Village | Feb 15 – Mar 20 |
| Salina | Mar 10 – Apr 1 |
| Shawnee | Mar 10 – Apr 1 |
| Spring Hill | Mar 1 – Apr 1 |
| Topeka | Mar 10 – Apr 1 |
| Wichita | Mar 1 – Apr 1 |
| Winfield | Mar 10 – Apr 1 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for onion sets.