Secrets to Success

USDA Hardiness Zones

How does it help me choose varieties for my garden?

The USDA hardiness zone map divides the U.S. into zones based on the historical average lowest winter temperature. Perennials naturally live for more that one year, but not all of them can survive cold temperatures. For example, a plant that is perennial in Texas may not be perennial in Minnesota. Perennials are rated using the USDA zone system, indicating the coldest zone they can survive, allowing gardeners to choose hardy plants for their garden.

The hardiness zone does not relate to the average last frost date, just the average coldest temperature. Add your zipcode to the USDA site to find your hardiness zone.

Look to our online perennial descriptions for hardiness zones.

You Might Enjoy…

Snapdragon Night and Day Seeds

Tender perennial. Night and Day is a robust, long-blooming, and visually striking cousin of the Black Prince snapdragon. It makes an…

Details…

Butterfly Flower Irresistible Milkweed Blend Seeds

Perennial. Butterflies and hummingbirds will flock to your garden to feast on the sweet nectar of this easy-to-grow native perennial.…

Details…

Echinacea Purple Coneflower Seeds

Perennial. This treasured, heirloom wildflower, native to the eastern and central U.S., is a long-lived perennial that blooms for a month or…

Details…
More to Enjoy