Plants that do not tolerate less than 10 degrees below zero Fahrenheit are not hardy here and will die due to the cold temperatures. Many plant tags have the hardiness zone listed. You want to look for zone 6 and lower, such as zone 5 and zone 4 on the tag. A zone 7 plant will not be hardy here. On some tags of perennials, shrubs and trees you will see the new plant heat zone number.
Plants can suffer damage from heat.
Some species of plants tolerate heat better than others. The heat zone map is based on the average number of days above 86 degrees Fahrenheit. Above 86 degrees Fahrenheit some plants begin to suffer damage. We are in heat zone 7 with 60 to 90 days above 86 degrees Fahrenheit during the growing season. We would want to choose plants for heat zone 7 and above.