What is a hardiness zone?

A hardiness zone is an area with a minimum and maximum temperature. Each plant description in PlantSwatch™ includes the zone(s) where that plant will grow.

What is my hardiness zone?

Review the Plan Hardiness Zones guide in PlantSwatch™ to see which ones correspond to your local temperatures. Using the color & number coded bars on each page, look for plants within that range.

Can these zones vary?

Discuss your choices with your local garden center specialist - some plants are more (or less!) forgiving of an unseasonal rise or drop in temperature.

My garden has micro climates.

You’ve probably noticed plants that are close to the warm walls of your home experience an earlier Spring. Within the space of one garden there are many factors that could influence the growth of plants. A south facing white wall where the sun reflects onto a flower bed may provide enough extra light and warmth to allow plants to grow that are not normally associated with that area’s hardiness zone.