Collards go into North Carolina ground at two very different moments: a spring window that opens once the soil itself has warmed, and a summer sowing…

New York City’s frost dates say collards can go into the ground in early April, but the plant itself is waiting on something else entirely: soil…

Collards go into New Mexico ground once the soil itself has warmed, not on a calendar date alone.

Collards go into New Jersey gardens twice a year for most home growers: a spring planting timed to the state’s last frost, and a fall planting that often…

Manchester’s frost dates set the outer edge for collards in New Hampshire, but soil temperature, winter lows, and summer humidity decide how the crop actually performs.

Collards can grow well in Newfoundland and Labrador, but the province’s cool, maritime climate means the calendar runs differently than it does further…

Collards can be grown across New Brunswick as an autumn crop, sown once the danger of frost has genuinely passed rather than on a fixed calendar date.

Collards can be planted almost any month somewhere in Nevada, but the state stretches from low desert basins to mile-high mountain valleys, and that gap…

Collards go into a Nebraska garden once the soil has caught up with spring, not the moment the calendar clears frost risk.