Plant growers and gardeners in the ... Each zone also has half-zones, with 5 degrees of difference. Arizona spans across zones 5 through 10. The new map, created by USDA's Agricultural Research ...

A hardiness zone is a geographic area with a similar average minimum temperature. The map is based on the average annual extreme minimum temperature, so people in those areas know which plants can ...

The data, reflected in the updated Plant Hardiness Zone Map in November ... At Janna Anderson's 17-acre South Phoenix Pinnacle Farms in Arizona, she's already begun replacing heat-killed peach ...

released a new version of its Plant Hardiness Zone map, the first update since 2012. This new map is a tool used to help gardeners and growers understand which plants can flourish in particular ...

which released a new version of its "Plant Hardiness Zone Map" this week, the first update since 1990. The color-coded zones on this map of the United States are widely used as a guide for what ...