USDA Hardiness Zones
Understanding your USDA Hardiness Zone is one of the best ways to choose plants that will thrive in your garden year after year. Hardiness zones are based on the average annual minimum winter temperature in your area and help determine which plants can survive your winters.
Find Your Growing Zone
Enter your ZIP code in the Growing Zone box above to instantly reveal your USDA Hardiness Zone and see plant recommendations that grow well in your area.
Every plant on our website also includes its recommended growing zones so you can shop with confidence and choose varieties best suited for your climate.
What Are USDA Hardiness Zones?
The USDA Plant Hardiness Zone Map divides the United States into 13 growing zones based on average annual minimum winter temperatures. Each zone represents a 10°F range and is further divided into “a” and “b” subzones for greater accuracy.
For example:
- Zone 6 = colder winters
- Zone 8 = milder winters
- Zone 10 = very warm climates
The lower the number, the colder the winter temperatures typically are.
Why Growing Zones Matter
Knowing your growing zone helps you:
- Choose plants more likely to survive winter
- Select varieties suited to your climate
- Improve long-term plant health and productivity
- Reduce winter damage and plant loss
Hardiness zones are especially important for:
- Blueberries
- Blackberries
- Fruit trees
- Perennials
- Shrubs and ornamental plants
Most plant tags and nursery listings include recommended zones because cold tolerance varies by variety.
Important Note About Growing Zones
Hardiness zones are an excellent starting point, but they are not the only factor that affects plant success.
Other important conditions include:
- Summer heat
- Humidity
- Rainfall
- Soil drainage
- Sun exposure
- Wind protection
- Microclimates around your home
For example, a protected sunny area near a wall may stay warmer than the rest of your yard.
Blueberries & Hardiness Zones
Most blueberries grow best in Zones 5–9 depending on the variety.
Southern Highbush
- Best for warmer climates
- Commonly grown in Zones 7–10
Rabbiteye Blueberries
- Excellent heat tolerance
- Thrive in Zones 7–9
Northern Highbush
- Better for colder winters
- Often grown in Zones 4–7
Selecting the correct blueberry type for your zone improves fruit production, plant vigor, and long-term success.
Blackberries & Hardiness Zones
Most blackberries grow well in Zones 5–9, though some varieties tolerate colder or warmer climates.
Blackberries generally prefer:
- Full sun
- Well-drained soil
- Moderate winter conditions
In colder climates, mulch and winter protection may help young canes survive extreme freezes.
Tips for Success in Any Zone
- Match plants to your zone whenever possible
- Improve drainage before planting
- Mulch to protect roots and conserve moisture
- Water consistently during establishment
- Choose disease-resistant varieties suited to your climate
Start Growing Smarter
Use the ZIP code tool above to discover your growing zone and explore plants recommended for your region.
Whether you're planting blueberries, blackberries, or expanding your edible garden, choosing zone-appropriate plants is the first step toward long-term success.