Cover crops go into Oklahoma ground once the soil itself has warmed, not on a calendar date, and once you know your own frost window the rest of the…

Cereal rye tops the list for most of Illinois because it survives the state’s coldest winter nights and still gives you a thick mat of green before…

Ohio’s cover crop calendar runs on soil temperature, not the calendar page. In zone 6a, spring sowing waits until early-to-mid May, and fall sowing needs…

For most Idaho gardens and fields, the safest cover crop choices are cool-season types: winter cereal rye, oats, field peas, and hairy vetch in the…

Cover crops can work in Nunavut, but the growing window is short enough that most of the usual playbook falls away.

There’s no single “best” cover crop for Hawaii because there’s no single Hawaii growing season to plan around.

Nova Scotia gardeners can start warm-season cover crops once soil has shed its spring chill, typically from mid-to-late May onward, and switch to…

Georgia’s answer splits by season, not by variety. Cool-season legumes and cereals, crimson clover, hairy vetch, cereal rye, oats, cover the…

Cover crops in the Northwest Territories go in once the soil itself has warmed, which trails the average last spring frost of May 25 at Yellowknife by a…