When to plant Onions in Kansas
In spring, from Feb 15 – Mar 15 in Kansas City to Apr 1 – May 1 in Garden City.
In fall: USDA's 1967 table lists onion plants as generally spring-planted in every place here. Newer advice from your state's extension service may differ.
Dates are for setting out plants. 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 15 – Apr 10 |
| El Dorado | Mar 1 – Apr 1 |
| Emporia | Mar 1 – Apr 1 |
| Garden City | Apr 1 – May 1 |
| Gardner | Mar 1 – Apr 1 |
| Great Bend | Mar 15 – Apr 10 |
| Hays | Mar 15 – Apr 10 |
| Haysville | Mar 1 – Apr 1 |
| Hutchinson | Mar 15 – Apr 10 |
| Junction City | Mar 1 – Apr 1 |
| Kansas City | Feb 15 – Mar 15 |
| Lansing | Mar 15 – Apr 10 |
| Lawrence | Mar 1 – Apr 1 |
| Leavenworth | Mar 1 – Apr 1 |
| Leawood | Mar 1 – Apr 1 |
| Lenexa | Mar 1 – Apr 1 |
| Liberal | Mar 15 – Apr 10 |
| Manhattan | Mar 15 – Apr 10 |
| McPherson | Mar 15 – Apr 10 |
| Merriam | Feb 15 – Mar 15 |
| Mission | Feb 15 – Mar 15 |
| Newton | Mar 1 – Apr 1 |
| Olathe | Mar 1 – Apr 1 |
| Ottawa | Mar 15 – Apr 10 |
| Overland Park | Mar 1 – Apr 1 |
| Pittsburg | Mar 1 – Apr 1 |
| Prairie Village | Feb 15 – Mar 15 |
| Salina | Mar 15 – Apr 10 |
| Shawnee | Mar 15 – Apr 10 |
| Spring Hill | Mar 1 – Apr 1 |
| Topeka | Mar 15 – Apr 10 |
| Wichita | Mar 1 – Apr 1 |
| Winfield | Mar 15 – Apr 10 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. The full USDA table for onion plants.