When to plant Onions in New Mexico

In spring, from Jan 15 – Feb 15 in Alamogordo to Apr 20 – May 15 in Las Vegas.

In fall, from Sept 1 – Oct 15 in Carlsbad to Oct 1 – Dec 31 in Alamogordo.

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.

Onion plants planting dates by place in New Mexico
PlaceSpringFall
AlamogordoJan 15 – Feb 15Oct 1 – Dec 31Now
AlbuquerqueMar 15 – Apr 10Spring-planted
ArtesiaMar 1 – Apr 1Not listed
CarlsbadFeb 10 – Mar 10Sept 1 – Oct 15
ClovisMar 1 – Apr 1Not listed
DemingMar 1 – Apr 1Not listed
EspañolaApr 10 – May 1Spring-planted
FarmingtonApr 1 – May 1Spring-planted
GallupApr 10 – May 1Spring-planted
HobbsFeb 15 – Mar 15Sept 1 – Oct 15
Las CrucesJan 15 – Feb 15Sept 1 – Oct 15
Las VegasApr 20 – May 15Spring-planted
Los LunasMar 15 – Apr 10Spring-planted
LovingtonFeb 15 – Mar 15Sept 1 – Oct 15
PortalesMar 1 – Apr 1Not listed
Rio RanchoMar 1 – Apr 1Not listed
RoswellMar 1 – Apr 1Not listed
Santa FeApr 10 – May 1Spring-planted
Sunland ParkFeb 10 – Mar 10Sept 1 – Oct 15

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 plants.