When to plant Collard greens in Arizona
In spring, from Jan 1 – Feb 15 in Apache Junction to May 10 – June 1 in Flagstaff.
In fall, from June 15 – July 15 in Flagstaff to Sept 1 – Dec 31 in Yuma.
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 | Fall |
|---|---|---|
| Apache Junction | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Avondale | — | Sept 1 – Dec 31Now |
| Buckeye | — | Sept 1 – Dec 31Now |
| Bullhead City | — | Sept 1 – Dec 31Now |
| Camp Verde | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Casa Grande | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Chandler | Jan 1 – Feb 15 | Sept 1 – Dec 1Now |
| Chino Valley | Apr 1 – June 1 | July 15 – Aug 15 |
| Coolidge | Jan 1 – Mar 15 | Sept 1 – Dec 1Now |
| Cottonwood | Mar 1 – June 1 | Aug 15 – Oct 1 |
| Douglas | Feb 15 – May 1 | Aug 15 – Oct 1 |
| El Mirage | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Eloy | Jan 15 – Mar 15 | Sept 1 – Dec 1Now |
| Flagstaff | May 10 – June 1 | June 15 – July 15 |
| Florence | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Fountain Hills | — | Sept 1 – Dec 31Now |
| Gilbert | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Glendale | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Goodyear | — | Sept 1 – Dec 31Now |
| Kingman | Mar 1 – June 1 | Aug 15 – Oct 1 |
| Lake Havasu City | — | Sept 1 – Dec 31Now |
| Marana | Mar 1 – June 1 | Aug 15 – Oct 1 |
| Maricopa | Jan 1 – Mar 15 | Aug 25 – Nov 1Now |
| Mesa | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Nogales | Feb 15 – May 1 | Aug 25 – Nov 1Now |
| Oro Valley | Mar 1 – June 1 | Aug 15 – Oct 1 |
| Paradise Valley | — | Sept 1 – Dec 31Now |
| Payson | Apr 1 – June 1 | July 15 – Aug 15 |
| Peoria | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Phoenix | — | Sept 1 – Dec 31Now |
| Prescott | Apr 1 – June 1 | July 15 – Aug 15 |
| Prescott Valley | Apr 1 – June 1 | July 15 – Aug 15 |
| Queen Creek | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Safford | Feb 15 – May 1 | Aug 15 – Oct 1 |
| Sahuarita | Jan 15 – Mar 15 | Sept 1 – Dec 1Now |
| San Luis | — | Sept 1 – Dec 31Now |
| Scottsdale | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Show Low | Apr 1 – June 1 | July 1 – Aug 1 |
| Sierra Vista | Mar 1 – June 1 | Aug 15 – Oct 1 |
| Somerton | — | Sept 1 – Dec 31Now |
| Surprise | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Tempe | Jan 1 – Feb 15 | Sept 1 – Dec 1Now |
| Tucson | Jan 1 – Feb 15 | Sept 1 – Dec 31Now |
| Yuma | — | Sept 1 – Dec 31Now |
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 collards.