Knowing when to plant in specific hardiness zones is important to maximize the spring season's potential. A hardiness zone is a geographic area with a similar average minimum temperature.

Arizona’s nuclear power plant, in the West Valley. “No matter where you are in that 10-mile emergency planning zone, you’ll be able to hear a siren,” said Ron Coleman, an emergency ...

Historically, this plant was found across sky island mountain ranges in southern Arizona and northern Mexico, but currently only 4,628 adult individuals are known to exist in the United States.