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…

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…

Butterfly Flower Milkweed Organic Seeds

Perennial. We all recognize the iconic Monarch butterfly with its majestic orange and black wings. Unfortunately, the butterfly we all know…

Details…

Stock Giant Imperial Blend Seeds

Tender perennial grown as an annual. Tall, majestic spikes of colorful blossoms with fantastic fragrance! This cottage garden flower…

Details…
More to Enjoy