Collards grow reliably in Nova Scotia, but timing matters more here than in most of the collard-growing range.

In Northwest Territories, collards work as a short, cool-season crop rather than the standing winter green they become farther south.

Collards can grow in North Dakota, but only as a single-season crop timed tightly between two frost dates.

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…